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Themed collection In Celebration of David Cole-Hamilton's Career in Chemistry

85 articles - Showing page 1 of 2
Editorial

An appreciation of Professor David Cole-Hamilton

It has been my privilege and pleasure to have been a friend of David Cole-Hamilton over many years. This Editorial provides a review of his research contributions.

Graphical abstract: An appreciation of Professor David Cole-Hamilton
Editorial

David Cole-Hamilton – the perfect academic

It is with the greatest of pleasure that we recognise David Cole-Hamilton's many accomplishments with this special Commemorative issue.

Graphical abstract: David Cole-Hamilton – the perfect academic
Perspective

Preparation of materials in the presence of hydrogen peroxide: from discrete or “zero-dimensional” objects to bulk materials

A short overview of synthetic methods using H2O2 and/or peroxidic species for the elaboration of discrete or zero-dimensional species, as well as mono-, bi- and tri-dimensional materials is presented.

Graphical abstract: Preparation of materials in the presence of hydrogen peroxide: from discrete or “zero-dimensional” objects to bulk materials
Perspective

Single source molecular precursor routes to lead chalcogenides

The use of single-source molecular precursors for lead chalcogenide thin films by CVD or as nanoparticles by solution methods is reviewed.

Graphical abstract: Single source molecular precursor routes to lead chalcogenides
Open Access Communication

Copper/TEMPO catalysed synthesis of nitriles from aldehydes or alcohols using aqueous ammonia and with air as the oxidant

A safe and readily accessible method for the aerobic catalytic synthesis of nitriles from aldehydes or alcohols.

Graphical abstract: Copper/TEMPO catalysed synthesis of nitriles from aldehydes or alcohols using aqueous ammonia and with air as the oxidant
Communication

Cyclic decapeptide gramicidin S derivatives containing phosphines: novel ligands for asymmetric catalysis

The cyclic peptide gramicidin S was used as a template for the construction of novel peptide-based bisphosphine ligands for asymmetric transition metal catalysis.

Graphical abstract: Cyclic decapeptide gramicidin S derivatives containing phosphines: novel ligands for asymmetric catalysis
Communication

Carbon monoxide and carbon dioxide insertion chemistry of f-block N-heterocyclic carbene complexes

The f-block complexes ([M(L)(N{SiMe3}2)2] L = bidentate alkoxy-tethered NHC ligand) with CO and CO2, COS and N2CPh2 show to [M(L)2(N{SiMe3}2)], show much more varied insertion chemistry than [M(N{SiMe3}2)3].

Graphical abstract: Carbon monoxide and carbon dioxide insertion chemistry of f-block N-heterocyclic carbene complexes
Communication

Simplifying the conductance profiles of molecular junctions: the use of the trimethylsilylethynyl moiety as a molecule–gold contact

The trimethylsilylethynyl moiety, –C[triple bond, length as m-dash]CSiMe3, is shown to act as an effective contact in Au|molecule|Au junctions.

Graphical abstract: Simplifying the conductance profiles of molecular junctions: the use of the trimethylsilylethynyl moiety as a molecule–gold contact
Communication

Co-crystallisation of competing structural modes in geometrically constrained Jahn–Teller manganese(III) complexes

The combination of Jahn–Teller distortion and chelating ligands produces a fine balance between competing coordination modes in manganese(III) resulting in well-ordered co-crystallization of two distinct assemblies from one set of components under a single set of conditions.

Graphical abstract: Co-crystallisation of competing structural modes in geometrically constrained Jahn–Teller manganese(iii) complexes
Communication

Ethylene/allyl monomer cooligomerization by nickel/phosphine–sulfonate catalysts

Nickel(II) complexes bearing a phosphine–sulfonate ligand, [(R2PC6H4SO3)NiMe(2,6-lutidine)] (R = cyclohexyl, 2-MeOC6H4, and 2-[2′,6′-(MeO)2C6H3]C6H4, were synthesized and applied as catalysts for the cooligomerizations of ethylene and allyl monomers.

Graphical abstract: Ethylene/allyl monomer cooligomerization by nickel/phosphine–sulfonate catalysts
Communication

Green production of polymer-supported PdNPs: application to the environmentally benign catalyzed synthesis of cis-3-hexen-1-ol under flow conditions

Polymer-supported PdNPs: from batch to continuous synthesis of fine chemicals.

Graphical abstract: Green production of polymer-supported PdNPs: application to the environmentally benign catalyzed synthesis of cis-3-hexen-1-ol under flow conditions
Communication

Cyclometallation of arylimines and nitrogen-containing heterocycles via room-temperature C–H bond activation with arene ruthenium(II) acetate complexes

The synthesis of stable imine (N^C)-cyclometallated ruthenium(II) complexes via C–H bond activation/deprotonation is described from the reaction of [RuCl2(p-cymene)]2, arylimines and KOAc in methanol at r.t.

Graphical abstract: Cyclometallation of arylimines and nitrogen-containing heterocycles via room-temperature C–H bond activation with arene ruthenium(ii) acetate complexes
Communication

Convenient and improved protocols for the hydrogenation of esters using Ru catalysts derived from (P,P), (P,N,N) and (P,N,O) ligands

Several active catalysts have been identified and applied in the hydrogenation of aromatic esters at temperatures as low as 30 °C.

Graphical abstract: Convenient and improved protocols for the hydrogenation of esters using Ru catalysts derived from (P,P), (P,N,N) and (P,N,O) ligands
Communication

Phosphate binding to the [Au(IPr)] moiety: inner vs. outer sphere coordination behaviour

The synthesis and characterization of a new class of cationic (NHC)gold(I) (NHC = N-Heterocyclic carbene) complexes containing the phosphate counterions TRISPHAT and TRISPHAT-N have been achieved.

Graphical abstract: Phosphate binding to the [Au(IPr)] moiety: inner vs. outer sphere coordination behaviour
Communication

Synthesis of mesoporous silica nanobamboo with highly dispersed tungsten carbide nanoparticles

Mesoporous silica nanobamboo with highly dispersed WC nanoparticles was synthesized by tuning the interaction between ammonium metatungstate and cetyltrimethylammonium bromide micelles.

Graphical abstract: Synthesis of mesoporous silica nanobamboo with highly dispersed tungsten carbide nanoparticles
Communication

Synthetic routes to [Au(NHC)(OH)] (NHC = N-heterocyclic carbene) complexes

New procedures for the synthesis of [Au(NHC)(OH)] are reported.

Graphical abstract: Synthetic routes to [Au(NHC)(OH)] (NHC = N-heterocyclic carbene) complexes
Open Access Paper

Reactivity of Ir(III) carbonyl complexes with water: alternative by-product formation pathways in catalytic methanol carbonylation

The unexpected reactivity towards water of an iridium acetyl complex points towards alternative by-product formation pathways in Ir-catalysed methanol carbonylation.

Graphical abstract: Reactivity of Ir(iii) carbonyl complexes with water: alternative by-product formation pathways in catalytic methanol carbonylation
Paper

An investigation of crystal structure, surface area and surface chemistry of strontium niobate and their influence on photocatalytic performance

Sr1−xNbO3 is an unusual material that displays both metallic type conduction and photocatalytic activity, despite being an NbIV oxide, and it sustains photo-oxidation without degradation.

Graphical abstract: An investigation of crystal structure, surface area and surface chemistry of strontium niobate and their influence on photocatalytic performance
Paper

Reactivity of the terminal oxo species ((tBu2PCH2SiMe2)2N)RhO

Unusual polarization of the Rh/O fragment of a (pincer)RhO molecule gives high reactivity towards the varied reagents CO, CO2, and H2.

Graphical abstract: Reactivity of the terminal oxo species ((tBu2PCH2SiMe2)2N)RhO
Paper

Stability vs. reactivity: understanding the adsorption properties of Ni3(BTP)2 by experimental and computational methods

This article shows that Ni3(BTP)2 adopts a low spin configuration which does not interact strongly with CO, CO2, or H2.

Graphical abstract: Stability vs. reactivity: understanding the adsorption properties of Ni3(BTP)2 by experimental and computational methods
Paper

Heterolytic activation of dihydrogen by platinum and palladium complexes

Under dihydrogen pressure, the pyridyl moiety of 2-(diphenylphosphino)pyridine can act as an internal base to assist the heterolytic cleavage of dihydrogen of platinum phosphine complexes.

Graphical abstract: Heterolytic activation of dihydrogen by platinum and palladium complexes
Paper

Catalyst recycling via specific non-covalent adsorption on modified silicas

This article describes a new strategy for the recycling of a homogeneous hydroformylation catalyst, by selective adsorption of the catalyst to tailor-made supports after a batchwise reaction.

Graphical abstract: Catalyst recycling via specific non-covalent adsorption on modified silicas
Paper

The re-determination of the molecular structure of antimony(III) oxide using very-high-temperature gas electron diffraction (VHT–GED)

The molecular structure of antimony(III) oxide has been re-investigated utilising a new high-temperature nozzle system designed for the Canterbury (NZ) gas electron diffraction apparatus.

Graphical abstract: The re-determination of the molecular structure of antimony(iii) oxide using very-high-temperature gas electron diffraction (VHT–GED)
Paper

Unexpected reversible pyrazine based methylation in a Ru(II) complex bearing a pyrazin-2′-yl-1,2,4-triazolato ligand and its effect on acid/base and photophysical properties

The reversible regioselective methylation of a ruthenium polypyridyl complex bearing both a 1,2,4-triazolato and a pyrazine moiety is reported.

Graphical abstract: Unexpected reversible pyrazine based methylation in a Ru(ii) complex bearing a pyrazin-2′-yl-1,2,4-triazolato ligand and its effect on acid/base and photophysical properties
Paper

Formic acid dehydrogenation catalysed by ruthenium complexes bearing the tripodal ligands triphos and NP3

Ru(II) complexes bearing the polydentate ligands triphos and NP3 catalyse the dehydrogenation of formic acid to carbon dioxide and hydrogen at 80 °C in the presence of n-octyldimethylamine.

Graphical abstract: Formic acid dehydrogenation catalysed by ruthenium complexes bearing the tripodal ligands triphos and NP3
Paper

Iron(II) and cobalt(II) complexes of tris-azinyl analogues of 2,2′:6′,2′′-terpyridine

Iron(II) and cobalt(II) complexes of seven different terpyridine analogues containing diazinyl or triazinyl heterocyclic donors have been prepared. The electrochemical properties of the complexes depend particularly strongly on the nitrogen content of the ligands.

Graphical abstract: Iron(ii) and cobalt(ii) complexes of tris-azinyl analogues of 2,2′:6′,2′′-terpyridine
Paper

Sc(III) complexes with neutral N3- and SNS-donor ligands – a spectroscopic study of the activation of ethene polymerisation catalysts

Scandium NMR and XAFS studies of the reaction of [ScCl3(L3)] (L3 = R3-tacn and R-SNS tridentate ligands) show that MeLi causes methylation at Sc, whereas AlMe3 forms Sc–Cl–Al bridges.

Graphical abstract: Sc(iii) complexes with neutral N3- and SNS-donor ligands – a spectroscopic study of the activation of ethene polymerisation catalysts
Paper

Synthetic and computational study of geminally bis(supermesityl) substituted phosphorus compounds

Mes*2P(O)Cl is a highly sterically crowded compound whose reduction requires very harsh conditions. Resulting secondary phosphine (Mes*)(2,4-tBu2C6H3)PH is also very sterically encumbered. Synthetic and computational studies of this and other related crowded phosphorus species are reported.

Graphical abstract: Synthetic and computational study of geminally bis(supermesityl) substituted phosphorus compounds
Paper

Selective hydrogenation over Pd nanoparticles supported on a pore-flow-through silica monolith microreactor with hierarchical porosity

Pore-flow-through silica monoliths featuring a bimodal distribution of macropores (4 μm) and mesopores (11 nm) loaded with 6 nm Pd nanoparticles demonstrate remarkable stability of the activity for the continuous selective hydrogenation of 1,5-cyclooctadiene and 3-hexyn-1-ol.

Graphical abstract: Selective hydrogenation over Pd nanoparticles supported on a pore-flow-through silica monolith microreactor with hierarchical porosity
Paper

Palladium-catalyzed asymmetric Heck arylation of 2,3-dihydrofuran – effect of prolinate salts

The phosphane-free catalytic system containing Pd(OAc)2 and chiral ionic liquids containing L-prolinate and L-lactate anions and non-chiral quaternary ammonium cations efficiently catalyzed regio- and stereoselective Heck arylation of 2,3-dihydrofuran with aryl iodides. Excellent enantioselectivity (>99% ee) was obtained in the reaction with tetrabutylammonium L-prolinate.

Graphical abstract: Palladium-catalyzed asymmetric Heck arylation of 2,3-dihydrofuran – effect of prolinate salts
Paper

Silver-catalyzed silicon–hydrogen bond functionalization by carbene insertion

The Si–H bonds of alkyl- aryl-substituted silanes have been functionalized using a silver-based catalyst for the carbene transfer reaction from diazocompounds.

Graphical abstract: Silver-catalyzed silicon–hydrogen bond functionalization by carbene insertion
Paper

Synthesis and X-ray structures of cyclometalated iridium complexes including the hydrides

Cyclometalated iridium complexes are catalytically active and can be easily accessed.

Graphical abstract: Synthesis and X-ray structures of cyclometalated iridium complexes including the hydrides
Paper

A computational study of the CO dissociation in cyclopentadienyl ruthenium complexes relevant to the racemization of alcohols

The formation of 16-electron ruthenium complexes via the loss of CO – an insight based on the potential energy profiles.

Graphical abstract: A computational study of the CO dissociation in cyclopentadienyl ruthenium complexes relevant to the racemization of alcohols
Paper

Classical and non-classical phosphine-Ru(II)-hydrides in aqueous solutions: many, various, and useful

Governed by the pH and pressure, hydrogenation of [{RuCl2(mtppms)2}2] yields various classical and non-classical Ru(II)-hydrides exhibiting different catalytic properties in hydrogenation of unsaturated aldehydes.

Graphical abstract: Classical and non-classical phosphine-Ru(ii)-hydrides in aqueous solutions: many, various, and useful
Paper

On the influence of diphosphine ligands on the chemical order in small RuPt nanoparticles: combined structural and surface reactivity studies

Diphenylphosphinobutane (dppb) stabilized bimetallic RuPt nanoparticles were prepared by co-decomposition of [Ru(COD)(COT)] and [Pt(CH3)2(COD)] organometallic precursors under mild conditions and in the presence of dppb.

Graphical abstract: On the influence of diphosphine ligands on the chemical order in small RuPt nanoparticles: combined structural and surface reactivity studies
Paper

Novel phospholyl(diphenylphosphino)methane-ruthenium complexes: unexpected non-assisted cis to trans isomerization of [RuCl22-P–P′)2]

The cis-[RuCl22-P–P′)2] complex containing the phospholyl(phosphino)methane ligand evolves very slowly at 20 °C into the trans-isomer, through decoordination of a phosphole arm.

Graphical abstract: Novel phospholyl(diphenylphosphino)methane-ruthenium complexes: unexpected non-assisted cis to trans isomerization of [RuCl2(κ2-P–P′)2]
Paper

Interplay of bite angle and cone angle effects. A comparison between o-C6H4(CH2PR2)(PR′2) and o-C6H4(CH2PR2)(CH2PR′2) as ligands for Pd-catalysed ethene hydromethoxycarbonylation

o-Diphosphinotoluenes produce Pd-catalysts for methoxycarbonylation of ethene with activities ranging from zero to the highest reported to date.

Graphical abstract: Interplay of bite angle and cone angle effects. A comparison between o-C6H4(CH2PR2)(PR′2) and o-C6H4(CH2PR2)(CH2PR′2) as ligands for Pd-catalysed ethene hydromethoxycarbonylation
Paper

Silver(I) coordination complexes and extended networks assembled from S, Se, Te substituted acenaphthenes

Chalcogen silver bonding leads to a range of coordination polymers depending on the nature of the chalcogen and the counterion.

Graphical abstract: Silver(i) coordination complexes and extended networks assembled from S, Se, Te substituted acenaphthenes
Paper

Rh-catalyzed linear hydroformylation of styrene

An inversion of natural regioselectivity in the Rh-catalyzed hydroformylation of styrene to the linear product by introducing electron-withdrawing ligands.

Graphical abstract: Rh-catalyzed linear hydroformylation of styrene
Paper

Direct ‘in situ’, low VOC, high yielding, CO2 expanded phase catalytic chain transfer polymerisation: towards scale-up

The successful application of catalytic chain transfer polymerisation (CCTP) by adopting an ‘in situ’ catalyst preparation methodology in several polymerisation media is described.

Graphical abstract: Direct ‘in situ’, low VOC, high yielding, CO2 expanded phase catalytic chain transfer polymerisation: towards scale-up
Paper

An investigation on the second order nonlinear optical response of tris-cyclometallated Ir(III) complexes with variously substituted 2-phenylpyridines

Various simple tris-cyclometallated Ir(III) complexes are efficient second-order NLO chromophores with a response tunable by an appropriate substitution of 2-phenylpyridine ligands.

Graphical abstract: An investigation on the second order nonlinear optical response of tris-cyclometallated Ir(iii) complexes with variously substituted 2-phenylpyridines
Paper

Hydrogenation of quinolines, alkenes, and biodiesel by palladium nanoparticles supported on magnesium oxide

A new catalyst composed of Pd nanoparticles supported on MgO is efficient for the regioselective hydrogenation of quinolines, a variety of alkenes representative of fuel components, and the partial saturation of biodiesel.

Graphical abstract: Hydrogenation of quinolines, alkenes, and biodiesel by palladium nanoparticles supported on magnesium oxide
Paper

Migratory insertion reactions of nickel and palladium σ-alkyl complexes with a phosphinito-imine ligand

The synthesis and migratory insertion reactions of σ-monoalkyl phosphinito-imine Ni and Pd complexes stabilized by a solvent molecule or intramolecular π-interactions are reported.

Graphical abstract: Migratory insertion reactions of nickel and palladium σ-alkyl complexes with a phosphinito-imine ligand
Paper

Phosphorescent, liquid-crystalline complexes of platinum(II): influence of the β-diketonate co-ligand on mesomorphism and emission properties

The effect of β-diketonate co-ligands on the mesomorphism and photophysics of some di(alkoxyphenyl)pyridine complexes of platinum(II) is investigated.

Graphical abstract: Phosphorescent, liquid-crystalline complexes of platinum(ii): influence of the β-diketonate co-ligand on mesomorphism and emission properties
Paper

Catalyzed hydrogenation of condensed three-ring arenes and their N-heteroaromatic analogues by a bis(dihydrogen) ruthenium complex

A comparative study on the catalyzed hydrogenation of linear three-ring aromatic hydrocarbons and their N-heteroaromatic analogues by ruthenium complexes is reported, with a specific focus on the influence of methyl substituents attached to the “external” and “internal” rings of the substrates.

Graphical abstract: Catalyzed hydrogenation of condensed three-ring arenes and their N-heteroaromatic analogues by a bis(dihydrogen) ruthenium complex
Paper

Nitrosobenzene as a hydrogen acceptor in rhodium catalysed dehydrogenation reactions of alcohols: synthesis of aldehydes and azoxybenzenes

A diolefin Rh(I) amido catalyst converts efficiently a mixture of alcohols and nitrosoarenes to aldehydes and azoxyarenes.

Graphical abstract: Nitrosobenzene as a hydrogen acceptor in rhodium catalysed dehydrogenation reactions of alcohols: synthesis of aldehydes and azoxybenzenes
Paper

Iridium(III) complexes with polypyridine ligands coordinated as N-heterocyclic carbenes. Synthesis, structure and photophysical properties

N-Heterocyclic carbene coordination of some polypyridines has been demonstrated.

Graphical abstract: Iridium(iii) complexes with polypyridine ligands coordinated as N-heterocyclic carbenes. Synthesis, structure and photophysical properties
Paper

Synthesis and structures of transition metal pacman complexes of heteroditopic Schiff-base pyrrole macrocycles

Macrocycles that combine pyrrole-imine and amine ether donor compartments form Ti, V, Cr, Co, and Pd complexes that adopt Pacman structures that facilitate the in-cleft binding of water through coordination and hydrogen bonds.

Graphical abstract: Synthesis and structures of transition metal pacman complexes of heteroditopic Schiff-base pyrrole macrocycles
Paper

Aqueous-phase hydroformylation of 1-octene using hydrophilic sulfonate salicylaldimine dendrimers

Preparation and characterization of water-soluble Rh(I) metallodendrimers. Hydroformylation under aqueous biphasic conditions is achieved at mild temperature and pressure. Good activities and selectivities are exhibited.

Graphical abstract: Aqueous-phase hydroformylation of 1-octene using hydrophilic sulfonate salicylaldimine dendrimers
Paper

Ligand effect on the catalytic activity of ruthenium nanoparticles in ionic liquids

Activity and selectivity of NP catalysts with size under 3 nm could be controlled by the σ-donor π-acceptor ligands as with a homogeneous catalyst.

Graphical abstract: Ligand effect on the catalytic activity of ruthenium nanoparticles in ionic liquids
Paper

Ultrafast exciton dynamics in InAs/ZnSe nanocrystal quantum dots

Colloidal nanocrystal quantum dots with a band gap in the near infra-red have potential application as the emitters for telecommunications or in vivo imaging, or as the photo-absorbing species in next generation solar cells or photodetectors.

Graphical abstract: Ultrafast exciton dynamics in InAs/ZnSe nanocrystal quantum dots
Paper

Rhodium complexes stabilized by phosphine-functionalized phosphonium ionic liquids used as higher alkene hydroformylation catalysts: influence of the phosphonium headgroup on catalytic activity

Monodentate phosphine-functionalized phosphonium ionic liquids (PFILs) were employed as ligands for Rh complexes and used in the hydroformylation of higher alkenes.

Graphical abstract: Rhodium complexes stabilized by phosphine-functionalized phosphonium ionic liquids used as higher alkene hydroformylation catalysts: influence of the phosphonium headgroup on catalytic activity
Open Access Paper

Minimizing side reactions in chemoenzymatic dynamic kinetic resolution: organometallic and material strategies

Strategies for reducing the side-reactions of chemoenzymatic DKR: tuning the organometallic catalyst and entrapping the biocatalyst.

Graphical abstract: Minimizing side reactions in chemoenzymatic dynamic kinetic resolution: organometallic and material strategies
Paper

Carboxylated polymers functionalized by cyclodextrins for the stabilization of highly efficient rhodium(0) nanoparticles in aqueous phase catalytic hydrogenation

Rhodium(0) nanoparticles stabilized by a water-soluble polymer catalyzed aqueous hydrogenation reaction.

Graphical abstract: Carboxylated polymers functionalized by cyclodextrins for the stabilization of highly efficient rhodium(0) nanoparticles in aqueous phase catalytic hydrogenation
Open Access Paper

Chiral Ag(I) and Pt(II) complexes of ditopic NHC ligands: synthesis, structural and spectroscopic properties

The platinum dinuclear complexes, cis-[Pt2(μ-NHC)(dmso)2Cl4], of ditopic chiral carbene ligands are reported. 1H, 13C, 195Pt and 1H–15N HMBC NMR data reveal the presence of rotamers in solution, arising from restricted rotation about the Pt–NHC bond.

Graphical abstract: Chiral Ag(i) and Pt(ii) complexes of ditopic NHC ligands: synthesis, structural and spectroscopic properties
Paper

Investigations on a series of novel ionic liquids containing the [closo-B12Cl12]2− dianion

A series of novel imidazolium, ammonium, phosphonium and pyridinium based salts with [closo-B12Cl12]2− dianion were synthesized by straight forward metathetic reactions and characterized by physical methods.

Graphical abstract: Investigations on a series of novel ionic liquids containing the [closo-B12Cl12]2− dianion
Paper

[Pd(NHC)(PR3)] (NHC = N-heterocyclic carbene) catalysed alcohol oxidation using molecular oxygen

A series of palladium(0) complexes bearing mixed phosphine/N-heterocyclic carbene supporting ligands are examined in aerobic oxidation of alcohols. These turn out to perform exceedingly well at low catalysts loadings under very mild conditions.

Graphical abstract: [Pd(NHC)(PR3)] (NHC = N-heterocyclic carbene) catalysed alcohol oxidation using molecular oxygen
Paper

Amidine- and amidinate-functionalised N-heterocyclic carbene complexes of silver and chromium

Diverse coordination modes are exhibited by the novel anionic amidinato NHC ligands.

Graphical abstract: Amidine- and amidinate-functionalised N-heterocyclic carbene complexes of silver and chromium
Paper

Synthesis and catalytic application of palladium imidazol(in)ium-2-dithiocarboxylate complexes

The first organometallic and phosphine-based palladium complexes bearing NHC·CS2 ligands have been prepared in good yield. Low loadings of selected complexes were found to be highly active and selective pre-catalysts for oxidative C–H functionalisation.

Graphical abstract: Synthesis and catalytic application of palladium imidazol(in)ium-2-dithiocarboxylate complexes
Open Access Paper

Variable coordination of a chiral diphosphine containing an amidinium/NHC group within its backbone: μ-P,P′, κ2-P,P′ and κ3-P,C,P′ coordination modes

An innately chiral diphosphine ligand with a central amidinium group shows variable coordination ranging from μ-bridging and κ2-binding through solely the phosphines to a κ3-mode upon release of the NHC donor with base. Conformational isomerism is observed in the complexes containing the tridentate ligand bound to Rh(I), Pd(II) and Pt(II).

Graphical abstract: Variable coordination of a chiral diphosphine containing an amidinium/NHC group within its backbone: μ-P,P′, κ2-P,P′ and κ3-P,C,P′ coordination modes
Paper

Molecular and electronic structures and photophysical properties of quadruply bonded dimetal complexes (M = Mo or W) supported by trans-arylethynylcarboxylate ligands where aryl = p-tolyl or 9-anthrancenyl

The title compounds shows interesting excited state charge delocalization and dynamics in S1 and T1 states as examined using fs and ns time-resolved UV-Vis and IR spectroscopy.

Graphical abstract: Molecular and electronic structures and photophysical properties of quadruply bonded dimetal complexes (M = Mo or W) supported by trans-arylethynylcarboxylate ligands where aryl = p-tolyl or 9-anthrancenyl
Paper

Facile two-electron reduction of a closo-rhodathiadecaborane

Three new 10-vertex rhodathiaboranes are sequentially formed in the reaction between [arachno-4-SB8H11] and [RhCl(PPh3)3]. This stepwise reactivity and the resulting closoarachnocloso structural and electronic response augurs a rich chemistry.

Graphical abstract: Facile two-electron reduction of a closo-rhodathiadecaborane
Paper

Coordination chemistry of diphenylphosphinoferrocenylthioethers on cyclooctadiene and norbornadiene rhodium(I) platforms

Compounds [RhCl(diene)(P,SR)] with chiral ferrocenyl phosphine–thioethers ligands preferentially adopt a neutral square planar structure with a dangling thioether as shown by a combination of 1H NMR, IR and DFT studies.

Graphical abstract: Coordination chemistry of diphenylphosphinoferrocenylthioethers on cyclooctadiene and norbornadiene rhodium(i) platforms
Paper

Anion-dependent construction of two hexanuclear 3d–4f complexes with a flexible Schiff base ligand

Two new complexes with linear Eu4Cu2 or Eu4Ni2 cores are formed with a salen type Schiff base which caps each end of the metal chain.

Graphical abstract: Anion-dependent construction of two hexanuclear 3d–4f complexes with a flexible Schiff base ligand
Paper

Synthesis and oxidation of d6 tungsten pincer complexes: a complete series of tungsten(II) hydridocarbonyl and halocarbonyl pincer complexes

Oxidation of d6 W(PHNP)(CO)3 gives a full series of cationic and neutral tungsten(II) hydridocarbonyls and halocarbonyls.

Graphical abstract: Synthesis and oxidation of d6 tungsten pincer complexes: a complete series of tungsten(ii) hydridocarbonyl and halocarbonyl pincer complexes
Paper

N–H bond activation by palladium(II) and copper(I) complexes featuring a reactive bidentate PN-ligand

Backbone reactivity of a bidentate PN-ligand in the context of N–H activation leads to PdII and CuI amido complexes.

Graphical abstract: N–H bond activation by palladium(ii) and copper(i) complexes featuring a reactive bidentate PN-ligand
Paper

TeX4 (X = F, Cl, Br) as Lewis acids – complexes with soft thio- and seleno-ether ligands

A systematic study of Te(IV) halide chemistry (halide = F, Cl or Br) with soft, neutral thio-, seleno- and telluroether ligands reveals significant coordination chemistry with the TeX4 Lewis acids, with clear boundaries between complexation and redox processes; NMR spectroscopic trends are reported and the distorted square pyramidal [TeF4(OPR3)] (R = Me or Ph) are included.

Graphical abstract: TeX4 (X = F, Cl, Br) as Lewis acids – complexes with soft thio- and seleno-ether ligands
Paper

Untethered 4,1,2-MC2B10 supraicosahedral metallacarboranes, their C,C′-dimethyl 4,1,6-, 4,1,8- and 4,1,12-MC2B10 analogues, and DFT study of the (4,)1,2- to (4,)1,6-isomerisations of C2B11 carboranes and MC2B10 metallacarboranes

Reduction and subsequent metallation of the tethered carborane shown affords both 4,1,2- and 4,1,6- MC2B-10 metallacarboranes by two quite separate routes.

Graphical abstract: Untethered 4,1,2-MC2B10 supraicosahedral metallacarboranes, their C,C′-dimethyl 4,1,6-, 4,1,8- and 4,1,12-MC2B10 analogues, and DFT study of the (4,)1,2- to (4,)1,6-isomerisations of C2B11 carboranes and MC2B10 metallacarboranes
Paper

Hydrogenolysis of β-O-4 lignin model dimers by a ruthenium-xantphos catalyst

In the presence of Ru(H)2(CO)(PPh3)(xantphos), under N2 or Ar, the alcohol function in lignin models is dehydrogenated. The ketone then undergoes C–O cleavage to form guaiacol and acetophenone derivatives; this hydrogenolysis also occurs readily under H2. When a –CH2– of the ketone is replaced by –CH(CH2OH)–, the catalysed hydrogenolysis is inhibited due to formation of characterised inactive Ru species.

Graphical abstract: Hydrogenolysis of β-O-4 lignin model dimers by a ruthenium-xantphos catalyst
Paper

35/37Cl and 16/18O isotope resolved 195Pt NMR: unique spectroscopic ‘fingerprints’ for unambiguous speciation of [PtCln(H2O)6−n]4−n (n = 2–5) complexes in an acidic aqueous solution

The 128.8 MHz 195Pt NMR peaks of [Pt35/37Cln(H216/18O)6−n]n−2 (n = 2–6) complexes display unique 35/37Cl and 16/18O isotope resolved ‘fingerprints’ characteristic of the structure of the PtIV complexes, providing a novel method for unambiguous chemical speciation, particularly of the stereoisomers.

Graphical abstract: 35/37Cl and 16/18O isotope resolved 195Pt NMR: unique spectroscopic ‘fingerprints’ for unambiguous speciation of [PtCln(H2O)6−n]4−n (n = 2–5) complexes in an acidic aqueous solution
85 articles - Showing page 1 of 2

About this collection

We are delighted to present this collection of articles that have been dedicated to Professor David Cole-Hamilton, in celebration of his career.

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