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Themed collection In celebration of Richard Andersen’s 75th birthday

31 items
Editorial

An enigmatic trailblazer on the frontier of discovery: Richard A. Andersen

This web-theme special issue, encompassing contributions to both ChemComm and Dalton Transactions, celebrates the impact that Richard “Dick” Andersen has had on inorganic and organometallic chemistry, on the occasion of his 75th birthday.

Graphical abstract: An enigmatic trailblazer on the frontier of discovery: Richard A. Andersen
Perspective

Teaching from the primary inorganic literature: lessons from Richard Andersen

Teaching inorganic chemistry using the primary literature motivates students to learn deeply and to engage with the important discoveries of the field.

Graphical abstract: Teaching from the primary inorganic literature: lessons from Richard Andersen
From the themed collection: 2018 Frontier and Perspective articles
Feature Article

Recent developments in actinide metallacycles

Recent developments in the synthesis and reactivity of actinide metallacycles are highlighted.

Graphical abstract: Recent developments in actinide metallacycles
Communication

[(NHC)CoR2]: pre-catalysts for homogeneous olefin and alkyne hydrogenation

[(ItBu)Co(CH2SiMe3)2] serves as an efficient, homogeneous olefin hydrogenation catalyst.

Graphical abstract: [(NHC)CoR2]: pre-catalysts for homogeneous olefin and alkyne hydrogenation
Communication

Isolation and characterization of a high-spin mixed-valent iron dinitrogen complex

A new mixed-valence iron–dinitrogen complex has localized valence by IR and Mossbauer spectroscopies, and slow magnetic relaxation.

Graphical abstract: Isolation and characterization of a high-spin mixed-valent iron dinitrogen complex
Communication

Synthesis of novel copper-rare earth BINOLate frameworks from a hydrogen bonding DBU-H rare earth BINOLate complex

The preparation of a novel H-bonding DBU-H+ BINOLate-lanthanide complex enabled the synthesis of the first copper-Rare Earth Metal BINOLate complex (CuDBU-REMB).

Graphical abstract: Synthesis of novel copper-rare earth BINOLate frameworks from a hydrogen bonding DBU-H rare earth BINOLate complex
Communication

Synthesis of a (N,C,C) Au(III) pincer complex via Csp3–H bond activation: increasing catalyst robustness by rational catalyst design

The synthesis of a (N,C,C) Au(III) catalyst via Csp3–H bond activation has been achieved following a rational catalyst design approach.

Graphical abstract: Synthesis of a (N,C,C) Au(iii) pincer complex via Csp3–H bond activation: increasing catalyst robustness by rational catalyst design
Communication

Reactivity of a trans-[H–Mo[quadruple bond, length as m-dash]Mo–H] unit towards alkenes and alkynes: bimetallic migratory insertion, H-elimination and other reactions

A full house of elementary reactions across a quadruple Mo[quadruple bond, length as m-dash]Mo bond.

Graphical abstract: Reactivity of a trans-[H–Mo [[quadruple bond, length as m-dash]] Mo–H] unit towards alkenes and alkynes: bimetallic migratory insertion, H-elimination and other reactions
Communication

Nuclearity effects in supported, single-site Fe(II) hydrogenation pre-catalysts

Dimeric and monomeric supported single-site Fe(II) organometallics are active hydrogenation catalysts.

Graphical abstract: Nuclearity effects in supported, single-site Fe(ii) hydrogenation pre-catalysts
Communication

Rare earth arylsilazido compounds with inequivalent secondary interactions

Planar, three-coordinate homoleptic rare earth complexes Ln{N(SiHMe2)Dipp}3 (Ln = Sc, Y, and Lu), each containing three secondary Ln↼HSi interactions, react with acetophenone via hydrosilylation, rather than by insertion into the Y–N bond or by enolate formation.

Graphical abstract: Rare earth arylsilazido compounds with inequivalent secondary interactions
Communication

Non-aqueous neptunium and plutonium redox behaviour in THF – access to a rare Np(III) synthetic precursor

Redox stability of tetravalent Np and Pu in THF is explored, leading to facile access routes into anhydrous Np(III) chemistry.

Graphical abstract: Non-aqueous neptunium and plutonium redox behaviour in THF – access to a rare Np(iii) synthetic precursor
Communication

Silica-supported isolated molybdenum di-oxo species: formation and activation with organosilicon agent for olefin metathesis

A well-defined silica-supported molybdenum dioxo species, ([triple bond, length as m-dash]SiO)2Mo(O)2, prepared via Surface Organometallic Chemistry, is highly active in metathesis upon reaction with organosilicon reducing agent.

Graphical abstract: Silica-supported isolated molybdenum di-oxo species: formation and activation with organosilicon agent for olefin metathesis
Open Access Communication

Double uranium oxo cations derived from uranyl by borane or silane reduction

A new type of double uranium oxo cation [O–U–O–U–O]4+ is prepared by selective oxygen-atom abstraction from macrocyclic uranyl complexes using either boranes or silanes.

Graphical abstract: Double uranium oxo cations derived from uranyl by borane or silane reduction
Communication

Homoleptic U(III) and U(IV) amidate complexes

Homoleptic U(IV) and U(III) amidate complexes have been isolated and characterized; these species undergo an unusual and reversible change in coordination number upon reduction/oxidation.

Graphical abstract: Homoleptic U(iii) and U(iv) amidate complexes
Paper

Solution structure and structural rearrangement in chiral dimeric ytterbium(III) complexes determined by paramagnetic NMR and NIR-CD

The accurate determination of the structure in solution of chiral lanthanide complexes is of crucial importance to understand enantioselective catalysis, and the optical and magnetic properties.

Graphical abstract: Solution structure and structural rearrangement in chiral dimeric ytterbium(iii) complexes determined by paramagnetic NMR and NIR-CD
Paper

A sulphur and uranium fiesta! Synthesis, structure, and characterization of neutral terminal uranium(VI) monosulphide, uranium(VI) η2-disulphide, and uranium(IV) phosphine sulphide complexes

Three new uranium species, (C5Me5)2U([double bond, length as m-dash]N-2,6-iPr2-C6H3)([double bond, length as m-dash]S), (C5Me5)2U([double bond, length as m-dash]N-2,6-iPr2-C6H3)(η2-S2), and (C5Me5)2U([double bond, length as m-dash]N-2,6-iPr2-C6H3)(S[double bond, length as m-dash]PMe3) have been prepared.

Graphical abstract: A sulphur and uranium fiesta! Synthesis, structure, and characterization of neutral terminal uranium(vi) monosulphide, uranium(vi) η2-disulphide, and uranium(iv) phosphine sulphide complexes
From the themed collection: Dalton Transactions HOT Articles
Paper

Halide and substituent dependent structural variation in copper(I) halide complexes of 1,5,9-triphosphacyclododecanes

Mono- or dimeric structures of Cu(I) complexes of 12aneP3 macrocycles are obtained depending on the nature of the secondary halide ligand.

Graphical abstract: Halide and substituent dependent structural variation in copper(i) halide complexes of 1,5,9-triphosphacyclododecanes
Paper

H2 addition to (Me4PCP)Ir(CO): studies of the isomerization mechanism

Compared to analogous sterically demanding complexes, the methyl derived pincer iridium complex shows enhanced reactivity with H2 including: rapid isomerization from a cis- to trans-dihydride complex and solvent activation during isomerization.

Graphical abstract: H2 addition to (Me4PCP)Ir(CO): studies of the isomerization mechanism
Paper

Variable coordination of carbazolyl-bis(tetrazole) ligands in lanthanide chemistry

Lanthanide complexes of 1,8-bis(2′-isopropyltetrazo-5′-yl)-3,6-di-tert-butylcarbazolide adopt geometries that include planar, buckled and tetrazolyl-bridged tridentate, as well as bidentate, bonding modes.

Graphical abstract: Variable coordination of carbazolyl-bis(tetrazole) ligands in lanthanide chemistry
Paper

Titanium thiosalicylate complexes: functional metalloligands for the construction of redox-active heterometallic architectures

A new versatile titanium metalloligand for the synthesis of redox active d0–d8 heterometallic complexes.

Graphical abstract: Titanium thiosalicylate complexes: functional metalloligands for the construction of redox-active heterometallic architectures
Paper

Monomeric thorium chalcogenolates with bipyridine and terpyridine ligands

Thorium chalcogenolates react with bipyridine or terpyridine to form a series of chelate stabilized Th(ER)4 compounds (E = S, Se; R = Ph, C6F5). 77Se NMR shows that the eight coordinate structures are maintained in solution. These compounds are thermochromic, with color originating from a visible ligand to ligand charge transfer excitation.

Graphical abstract: Monomeric thorium chalcogenolates with bipyridine and terpyridine ligands
Paper

Bis(pentalene)dititanium chemistry: C–H, C–X and H–H bond activation

Formation of an agostic hydrogen by protonation of a “tucked-in” bis(pentalene)ditanium complex.

Graphical abstract: Bis(pentalene)dititanium chemistry: C–H, C–X and H–H bond activation
Paper

Synthesis and molecular structure of pentadienyl complexes of the rare-earth metals

In combination with small and difficult to reduce rare-earth metals pdl′ undergoes CH-bond activations instead of sterically induced reductions to form dimeric complexes with a unique bridging six-membered metallacycle as the central structural motif.

Graphical abstract: Synthesis and molecular structure of pentadienyl complexes of the rare-earth metals
Paper

A series of dithiocarbamates for americium, curium, and californium

The isolation and characterization of a series of transplutonium coordination complexes provided insight in advancing understanding of how actinide properties change across the 5f-element series.

Graphical abstract: A series of dithiocarbamates for americium, curium, and californium
Paper

Solid-state 45Sc NMR studies of Cp*2Sc–X and Cp*2ScX(THF)

A systematic study showing how the Sc–X bond affects solid-state 45Sc NMR quadrupolar coupling constants in Cp*2Sc–X.

Graphical abstract: Solid-state 45Sc NMR studies of Cp*2Sc–X and Cp*2ScX(THF)
Paper

Synthesis and coordination chemistry of new asymmetric donor/acceptor pincer ligands, 1,3-C6H4(CH2PtBu(Rf))2 (Rf = CF3, C2F5)

Syntheses of new asymmetric pincer precursors 1,3-C6H4{CH2P(tBu,X)}2 (tBu,XPCPH; X = Cl, SiMe3, OPh) and a new class of hybrid donor/acceptor pincer ligands 1,3-C6H4{CH2P(tBu,Rf)}2 (tBu,RfPCPH; Rf = CF3, C2F5) are reported.

Graphical abstract: Synthesis and coordination chemistry of new asymmetric donor/acceptor pincer ligands, 1,3-C6H4(CH2PtBu(Rf))2 (Rf = CF3, C2F5)
Paper

Cobalt(II) acyl intermediates in carbon–carbon bond formation and oxygenation

Tetrahedral cobalt(II) hydrocarbyl and CO reversibly form acylcobalt, coupling to give α-hydroxyketone compounds, or oxygenation with O2 to cobalt(II) carboxylates.

Graphical abstract: Cobalt(ii) acyl intermediates in carbon–carbon bond formation and oxygenation
Paper

Synthesis, structures, and reactivity studies of cyclometalated N-heterocyclic carbene complexes of ruthenium

Dehydrochlorination of Cp*Ru(IPr)Cl leads to an unusual C–C bond activation, yielding a cyclometalated Ru complex bearing an NHC-C(sp2) ligand. Reactivity studies of cyclometalated Ru complexes were explored.

Graphical abstract: Synthesis, structures, and reactivity studies of cyclometalated N-heterocyclic carbene complexes of ruthenium
Paper

Redox behaviour of ([fc(NPiPr2)2]Fe)2, formation of an iron–iron bond and cleavage of azobenzene

The redox behaviour of the dimeric tetrairon complex, ([fc(NPiPr2)2]Fe)2 (where fc(NPiPr2)2 = 1,1′-(C5H4NPiPr2)2Fe) has been investigated.

Graphical abstract: Redox behaviour of ([fc(NPiPr2)2]Fe)2, formation of an iron–iron bond and cleavage of azobenzene
Paper

Easily reduced bis-pincer (NS2)2molybdenum(IV) to (NHS2)2Mo(II) by alcohols vs. redox-inert (NS2)(NHS2)iron(III) complexes

Iron and molybdenum complexes supported by a pincer-type dianionic [NS2]2− donor were prepared to compare their structural, spectroscopic, and electrochemical properties.

Graphical abstract: Easily reduced bis-pincer (NS2)2molybdenum(iv) to (NHS2)2Mo(ii) by alcohols vs. redox-inert (NS2)(NHS2)iron(iii) complexes
Paper

NIXANTPHOS: a highly active ligand for palladium catalyzed Buchwald–Hartwig amination of unactivated aryl chlorides

The NIXANTPHOS-based catalyst outperformed the parent ligand Xantphos in Pd catalyzed amination reaction of aryl chlorides at room temperature.

Graphical abstract: NIXANTPHOS: a highly active ligand for palladium catalyzed Buchwald–Hartwig amination of unactivated aryl chlorides
31 items

About this collection

This web-theme special issue, encompassing contributions to both ChemComm and Dalton Transactions, celebrates the impact that Richard ‘‘Dick’’ Andersen has had on inorganic and organometallic chemistry, on the occasion of his 75th birthday.

This collection is guest edited by Professor T. Don Tilley (UC, Berkeley) and Professor John Arnold (UC, Berkeley).

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