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Themed collection Main Group Transformations

53 articles
Editorial

Main group transformations

Welcome to this themed issue of Dalton Transactions focusing on main group transformations.

Graphical abstract: Main group transformations
From the themed collection: Main Group Transformations
Perspective

Cyclodiphosphazanes: options are endless

This short review describes the transition metal chemistry of cyclodiphosphazanes.

Graphical abstract: Cyclodiphosphazanes: options are endless
From the themed collection: Main Group Transformations
Open Access Perspective

Inorganic sulfur–nitrogen compounds: from gunpowder chemistry to the forefront of biological signaling

History, chemical properties and emerging biology of HSNO/SNO, SSNO and [ONN(O)-SO3]2− and their role in the sulfide/nitric oxide cross talk.

Graphical abstract: Inorganic sulfur–nitrogen compounds: from gunpowder chemistry to the forefront of biological signaling
From the themed collection: Main Group Transformations
Open Access Perspective

A very peculiar family of N-heterocyclic phosphines: unusual structures and the unique reactivity of 1,3,2-diazaphospholenes

The N-heterocyclic phosphines portrayed gain unusual chemical reactivity from the ionic polarization of exocyclic P–X bonds or low-energy P–P bond cleavage.

Graphical abstract: A very peculiar family of N-heterocyclic phosphines: unusual structures and the unique reactivity of 1,3,2-diazaphospholenes
From the themed collection: Main Group Transformations
Perspective

25 years of N-heterocyclic carbenes: activation of both main-group element–element bonds and NHCs themselves

Expanding the belt! NHC ring expansion reactions and E–E activation from the 1960s till the present are summarized.

Graphical abstract: 25 years of N-heterocyclic carbenes: activation of both main-group element–element bonds and NHCs themselves
From the themed collection: Main Group Transformations
Communication

B(C6F5)3-catalyzed metal-free hydrogenation of 3,6-diarylpyridazines

Metal-free hydrogenation of 3,6-diarylpyridaxines was realized for the first time to furnish 1,4,5,6-tetrahydropyridazine derivatives in 85–95% yields.

Graphical abstract: B(C6F5)3-catalyzed metal-free hydrogenation of 3,6-diarylpyridazines
From the themed collection: Main Group Transformations
Communication

Abnormal carbene–silicon halide complexes

Reaction of the anionic NHDC ligand, [:C{[N(2,6-Pri2C6H3)]2CHCLi}]n (1), with SiCl4 gives the trichlorosilyl-substituted NHC ligand (7). Abnormal carbene–SiCl4 complex (8) can be conveniently synthesized by combining 7 with HCl·NEt3. Meanwhile, 7 may react with CH2Cl2 in warm hexane, giving the abnormal carbene-complexed SiCl3+ cation (9). The structure and bonding of 9 have also been probed by DFT computations.

Graphical abstract: Abnormal carbene–silicon halide complexes
From the themed collection: Main Group Transformations
Communication

N-Heterocyclic olefin stabilized boron dication

Boron mono- and di-cations featuring a nucleophilic N-heterocyclic olefin and the pentamethylcyclopentadienyl substituent have been prepared and structurally characterized. Experimental and theoretical investigations show that [η5-Cp*B-NHO]2+ is considerably more Lewis acidic than [η5-Cp*B-IMes]2+ due to the steric congestion imposed by the bent geometry of NHO around the central boron atom.

Graphical abstract: N-Heterocyclic olefin stabilized boron dication
From the themed collection: Main Group Transformations
Communication

Reaction of an allylstannylene with adamantyl phosphaalkyne

The reaction of a terphenyl tin(II) compound bearing an η3 coordinating allyl ligand with adamantyl phosphaalkyne is reported.

Graphical abstract: Reaction of an allylstannylene with adamantyl phosphaalkyne
From the themed collection: Main Group Transformations
Open Access Communication

Lewis acid–base 1,2-addition reactions: synthesis of pyrylium borates from en-ynoate precursors

Treatment of methyl (Z)-2-alken-4-ynoates with the strong Lewis acid tris(pentafluorophenyl) borane, B(C6F5)3, yield 2,5,6-substituted zwitterionic pyrylium borate species via an intramolecular 6-endo-dig cyclisation reaction.

Graphical abstract: Lewis acid–base 1,2-addition reactions: synthesis of pyrylium borates from en-ynoate precursors
From the themed collection: Main Group Transformations
Communication

Facile kinetic induction of a dihydropyridide to pyrrolide ring contraction

A sterically demanding N-aryl carbodiimide reacts with magnesium 1,4-dihydropyridides to initiate heterocyclic ring contraction and pyrrolide formation under unprecedentedly mild conditions.

Graphical abstract: Facile kinetic induction of a dihydropyridide to pyrrolide ring contraction
Paper

Antiproliferative activity of (η6-arene)ruthenacarborane sandwich complexes against HCT116 and MCF7 cell lines

The [(η6-arene)RuC2B9H11] complexes (arene = p-cymene (2), biphenyl (3) and 1-Me-4-COOEt-C6H4 (4)) show cytotoxic activity and excellent selectivity towards specific tumour cells.

Graphical abstract: Antiproliferative activity of (η6-arene)ruthenacarborane sandwich complexes against HCT116 and MCF7 cell lines
From the themed collection: Main Group Transformations
Paper

N-Heterocyclic carbene adducts of the heavier group 15 tribromides. Normal to abnormal isomerism and bromide ion abstraction

The reactivity of the heavier group 15 tribromides, SbBr3 and BiBr3, towards 1,3-bis(2,6-diisopropylphenyl)-imidazol-2-ylidene (IPr) is described.

Graphical abstract: N-Heterocyclic carbene adducts of the heavier group 15 tribromides. Normal to abnormal isomerism and bromide ion abstraction
From the themed collection: Main Group Transformations
Paper

Homopolar dihydrogen bonding in ligand stabilized diberyllium hydride complexes, Be2(CH3)2H2L2 (L = H, CO, N-heterocyclic carbene and CN)

Diberyllium hydride complex – not a diborane analogue: the diberyllium hydrides Be2(CH3)2H2L2 (L = H, CO, NHC and CN) are isostructural to diborane but differ in the nature of the bonding interaction at the bridging H-atoms.

Graphical abstract: Homopolar dihydrogen bonding in ligand stabilized diberyllium hydride complexes, Be2(CH3)2H2L2 (L = H−, CO, N-heterocyclic carbene and CN−)
From the themed collection: Main Group Transformations
Open Access Paper

Variable coordination modes and catalytic dehydrogenation of B-phenyl amine–boranes

The binding mode of B-aryl substituted amine–boranes at {Rh(bisphoshine)}+ fragments can manipulated by variation of the P–Rh–P bite-angle.

Graphical abstract: Variable coordination modes and catalytic dehydrogenation of B-phenyl amine–boranes
From the themed collection: Main Group Transformations
Open Access Paper

Synthesis of mono-, di-, and triaminobismuthanes and observation of C–C coupling of aromatic systems with bismuth(III) chloride

Mono-, di- or triaminobismuthanes were synthesized depending on the sterical demand of the organic substituent. In one case, a C–C coupling product was observed as main product in the reaction of BiCl3 with Mes*(SiMe3)NLi.

Graphical abstract: Synthesis of mono-, di-, and triaminobismuthanes and observation of C–C coupling of aromatic systems with bismuth(iii) chloride
From the themed collection: Main Group Transformations
Paper

Tin-catalyzed hydrophosphination of alkenes

Simple tin derivatives, Cp*2SnCl2 (1) and Ph2SnCl2 (2), catalyze the hydrophosphination of alkene substrates with diphenylphosphine.

Graphical abstract: Tin-catalyzed hydrophosphination of alkenes
From the themed collection: Main Group Transformations
Open Access Paper

Synthesis and reactivity of fluorenyl-tethered N-heterocyclic stannylenes

N-Heterocyclic stannylenes containing a functionalised donor arm have been synthesised using a transamination strategy from [Sn{N(SiMe3)2}2] and fluorenyl-tethered diamines.

Graphical abstract: Synthesis and reactivity of fluorenyl-tethered N-heterocyclic stannylenes
From the themed collection: Main Group Transformations
Paper

Cyclic NHC-stabilized silylphosphinoalanes and -gallanes

The reaction between prestabilized group 13 metal hydrides and primary silylphosphines lead to the formation of rare, butterfly-like folded, four membered rings including free lone pairs on the phosphorus atoms, wherein the Lewis base can readily be substituted by N-heterocyclic carbenes.

Graphical abstract: Cyclic NHC-stabilized silylphosphinoalanes and -gallanes
From the themed collection: Main Group Transformations
Paper

Accessible heavier s-block dihydropyridines: structural elucidation and reactivity of isolable molecular hydride sources

Transmetallation of lithiodihydropyridines with Group 1 alkoxides provides facile access to reactive MH (M = Na, K) sources, which show significant structural diversity due in part to the distinct ways that Na/K engage with the σ (green) and π (red) donor systems of the DHP ligands.

Graphical abstract: Accessible heavier s-block dihydropyridines: structural elucidation and reactivity of isolable molecular hydride sources
From the themed collection: Main Group Transformations
Paper

Pyridinium–phosphonium dications: highly electrophilic phosphorus-based Lewis acid catalysts

Using commercially available 2-pyridyldiphenylphosphine (o-NC5H4)PPh2, a family of electrophilic phosphonium cations [(o-NC5H4)PFPh2]+ (2) and dications [(o-MeNC5H4)PRPh2]2+ (R = F (4); Me (5)) were prepared.

Graphical abstract: Pyridinium–phosphonium dications: highly electrophilic phosphorus-based Lewis acid catalysts
From the themed collection: Main Group Transformations
Paper

Monoorganoantimony(V) phosphonates and phosphoselininates

Synthesis and structural characterization of novel tetra- and dinuclear organoantimony oxo-hydroxo clusters ligated by phosphonates and phosphonates/selininates are reported. Mass spectral studies reveal that the solid state molecular structures of these clusters were retained in solution as well.

Graphical abstract: Monoorganoantimony(v) phosphonates and phosphoselininates
From the themed collection: Main Group Transformations
Paper

Blending materials composed of boron, nitrogen and carbon to transform approaches to liquid hydrogen stores

Mixtures of hydrogen storage materials are examined to find a ‘fuel blend’ that remains a liquid phase throughout hydrogen release, maximizes hydrogen storage density, minimizes impurities and is thermally stable.

Graphical abstract: Blending materials composed of boron, nitrogen and carbon to transform approaches to liquid hydrogen stores
From the themed collection: Main Group Transformations
Paper

Amino group combined P/Ge and P/Sn Lewis pairs: synthesis and dipolar addition reactions to alkyne and aldehyde molecules

Amino group combined P/Ge FLPs Ph2PN(R)GeCl3 (R = 2,6-iPr2C6H3 (1), 2,4,6-Me3C6H2 (2), and C6H11 (3)) and Ph2PN(2,6-iPr2C6H3)GeMe3 (4) as well as P/Sn FLP Ph2PN(2,6-iPr2C6H3)SnMe3 (5) were prepared and utilized for reactions with alkyne and aldehyde molecules.

Graphical abstract: Amino group combined P/Ge and P/Sn Lewis pairs: synthesis and dipolar addition reactions to alkyne and aldehyde molecules
From the themed collection: Main Group Transformations
Paper

Synthetic and reactivity studies of hetero-tri-anionic sodium zincates

The blue, red and green spheres represent three different anions present within a series of novel hetero-trianionic sodium zincates. The syntheses and structures of the complexes are reported as well as their reactivities with important organic molecules.

Graphical abstract: Synthetic and reactivity studies of hetero-tri-anionic sodium zincates
From the themed collection: Main Group Transformations
Paper

A zwitterionic triphosphenium compound as a tunable multifunctional donor

We present a zwitterionic triphosphenium molecule which features dicoordinate, tricoordinate and tetracoordinate phosphorus centers in addition to a cyclopentadienyl moiety. Crystallographic, computational, electrochemical and spectroscopic data illustrate and rationalize the reactivity of this molecule as a multifunctional ligand for both transition metals and main group acceptors and suggest how the donor properties may be tuned.

Graphical abstract: A zwitterionic triphosphenium compound as a tunable multifunctional donor
From the themed collection: Main Group Transformations
Paper

The role of imidoselenium(II) chlorides in the formation of cyclic selenium imides via cyclocondensation

Imidoselenium(II) chlorides ClSe[N(tBu)Se]nCl (n = 1–3) are intermediates in the formation of cyclic selenium imides by the reaction of SeCl2 and tBuNH2 in THF.

Graphical abstract: The role of imidoselenium(ii) chlorides in the formation of cyclic selenium imides via cyclocondensation
From the themed collection: Main Group Transformations
Paper

Assessing the reactivity of sodium alkyl-magnesiates towards quinoxaline: single electron transfer (SET) vs. nucleophilic alkylation processes

Structurally tracking the reaction of a sodium butylmagnesiate supported by a bulky silyl(bisamide) ligand towards quinoxaline, SET reactivity.

Graphical abstract: Assessing the reactivity of sodium alkyl-magnesiates towards quinoxaline: single electron transfer (SET) vs. nucleophilic alkylation processes
From the themed collection: Main Group Transformations
Paper

Hydroamination of diphenylbutadiyne with secondary N-methyl-anilines using the dipotassium tetrakis(2,6-diisopropylanilino)calciate precatalyst

The s-block metal complex [K2Ca{N(H)Dipp}4] represents a suitable catalyst for the regioselective catalytic single and two-fold hydroamination of diphenylbutadiyne with N-methyl-anilines.

Graphical abstract: Hydroamination of diphenylbutadiyne with secondary N-methyl-anilines using the dipotassium tetrakis(2,6-diisopropylanilino)calciate precatalyst
From the themed collection: Main Group Transformations
Paper

Functionalized alkynyl-chlorogermanes: hydrometallation, Ge–Cl bond activation, Ge–H bond formation and chlorine-tert-butyl exchange via a transient germyl cation

An Al–Cl functionalized germane with an activated Ge–Cl bond showed a tBu/Cl exchange via a transient germyl cation.

Graphical abstract: Functionalized alkynyl-chlorogermanes: hydrometallation, Ge–Cl bond activation, Ge–H bond formation and chlorine-tert-butyl exchange via a transient germyl cation
From the themed collection: Main Group Transformations
Open Access Paper

Group 13 metal complexes containing the bis-(4-methylbenzoxazol-2-yl)-methanide ligand

On the basis of the deprotonated bis-(4-methylbenzoxazol-2-yl)-methane ligand 1 a series of group 13 metal complexes was synthesised and fully characterised. A detailed comparison of solid state structures demonstrates clearly the similarity of methanide and the omnipresent nacnac ligand.

Graphical abstract: Group 13 metal complexes containing the bis-(4-methylbenzoxazol-2-yl)-methanide ligand
From the themed collection: Main Group Transformations
Open Access Paper

Bis-(benzothiazol-2-yl)-amines and their metal amides: a structural comparison in the solid state

A series of functionalised bis-(benzothiazol-2-yl)-amine ligands and the related dimethylaluminium amides were synthesised and characterised. The solid state structural comparison reveals various coordination motifs, specific folding parameters and hydrogen bonding patterns in detail and guide the way to future Janus head ligand design.

Graphical abstract: Bis-(benzothiazol-2-yl)-amines and their metal amides: a structural comparison in the solid state
From the themed collection: Main Group Transformations
Paper

Exploring the reducing role of boron: added insights from theory

Why are boron containing systems so effective at CO coupling? Full quantum chemical calculations with density functional theory (DFT) provide interesting insights into why recently reported CO coupling by diboryne systems is such a facile process.

Graphical abstract: Exploring the reducing role of boron: added insights from theory
From the themed collection: Main Group Transformations
Paper

Unsolvated Al(C6F5)3: structural features and electronic interaction with ferrocene

The unsolvated Al(C6F5)3 exists as a dimer in the solid state via double Al⋯(ortho-)F bridging and forms a stable adduct with Cp2Fe through η1-coordination.

Graphical abstract: Unsolvated Al(C6F5)3: structural features and electronic interaction with ferrocene
From the themed collection: Main Group Transformations
Open Access Paper

Smallest molecular chalcogenidometalate anions of the heaviest metals: syntheses, structures, and their interconversion

Smallest chalcogenidometalate anions of the heaviest metals are presented alongside calculated energetics of these heaviest homologues of [NOx], [PO4]2− and [CO3]2−.

Graphical abstract: Smallest molecular chalcogenidometalate anions of the heaviest metals: syntheses, structures, and their interconversion
From the themed collection: Main Group Transformations
Paper

Reversible hydrogen activation by a bulky haloborane based FLP system

The FLP species bis(2-(TMP)phenyl)chloroborane was prepared as a monomeric Frustrated Lewis Pair displaying no B–N interaction. Species 1 reacts with H2 to generate reversibly the zwitterionic H2 activation product.

Graphical abstract: Reversible hydrogen activation by a bulky haloborane based FLP system
From the themed collection: Main Group Transformations
Open Access Paper

Microwave-assisted FLP-catalyzed hydrogenations

Microwave-irradiation accelerates FLP-catalyzed hydrogenations.

Graphical abstract: Microwave-assisted FLP-catalyzed hydrogenations
From the themed collection: Main Group Transformations
Paper

Toward highly efficient blue organic light-emitting diodes: fabricating a good-quality emissive layer cast from suitable solvents

Cast from chlorobenzene, a light-emitting layer shows its best morphology and highest efficiency of 18.99 cd A−1 in single-layer FIrpic-based OLEDs.

Graphical abstract: Toward highly efficient blue organic light-emitting diodes: fabricating a good-quality emissive layer cast from suitable solvents
From the themed collection: Main Group Transformations
Paper

Unusual borane addition to conjugated dienylphosphanes under frustrated Lewis pair conditions

Dimesitylphosphinoisoprene reacts with a series of R-B(C6F5)2 boron Lewis acids by isomerization and subsequent 1,4-P/B addition to give the corresponding heterocyclic phosphonium/borate zwitterionic products.

Graphical abstract: Unusual borane addition to conjugated dienylphosphanes under frustrated Lewis pair conditions
From the themed collection: Main Group Transformations
Open Access Paper

Extending motifs in lithiocuprate chemistry: unexpected structural diversity in thiocyanate complexes

Lithio(thiocyanato)cuprates have been developed. These reveal planar, boat-shaped and chair-shaped Lipshutz-type dimers in the solid state, while Lipshutz-type and Gilman structures are seen in solution.

Graphical abstract: Extending motifs in lithiocuprate chemistry: unexpected structural diversity in thiocyanate complexes
From the themed collection: Main Group Transformations
Open Access Paper

Novel B(Ar′)2(Ar′′) hetero-tri(aryl)boranes: a systematic study of Lewis acidity

Nine homo- and hetero-tri(aryl)boranes related by stepwise aryl substitutions, are studied for H2 cleavage as part of an FLP, and comparative Lewis acidity/electrochemical measurements discussed.

Graphical abstract: Novel B(Ar′)2(Ar′′) hetero-tri(aryl)boranes: a systematic study of Lewis acidity
From the themed collection: Main Group Transformations
Paper

Synthesis of 2-(lutidinyl)organoboranes and their reactivities against dihydrogen and pinacol borane

The reactivity of two 2,4,6-tris(trifluoromethyl)phenyl-substituted 2-(lutidinyl)organoboranes as intramolecular frustrated Lewis pairs was investigated.

Graphical abstract: Synthesis of 2-(lutidinyl)organoboranes and their reactivities against dihydrogen and pinacol borane
From the themed collection: Main Group Transformations
Paper

Concise access to iminophosphonamide stabilized heteroleptic germylenes: chemical reactivity and structural investigation

A heteroleptic three coordinate germylene monochloride, its adduct with a Lewis acid, and germaacid-chloride & -ester derivatives with sulfur and selenium have been reported.

Graphical abstract: Concise access to iminophosphonamide stabilized heteroleptic germylenes: chemical reactivity and structural investigation
From the themed collection: Main Group Transformations
Paper

Transition metal-mediated donor–acceptor coordination of low-oxidation state Group 14 element halides

The main group element triggered C–H bond activation of a Rh-bound Cp ligand is reported. The key aspect of this transformation is the presence of a highly Lewis acidic Group 14 element site.

Graphical abstract: Transition metal-mediated donor–acceptor coordination of low-oxidation state Group 14 element halides
From the themed collection: Main Group Transformations
Open Access Paper

The carboboration of Me3Si-substituted alkynes and allenes with boranes and borocations

ArylBCl2 and aryl and vinyl containing borocations synthesised by electrophilic borylation effect the carboboration of TMS-substituted alkynes and allenes.

Graphical abstract: The carboboration of Me3Si-substituted alkynes and allenes with boranes and borocations
From the themed collection: Main Group Transformations
Paper

The first examples of 1-D organic hybrid lanthanoid thioarsenates based on two [AsVS4]3− linkage modes

Two different [AsVS4]3− linkage modes first coexist in 1-D organic hybrid lanthanoid thioarsenates.

Graphical abstract: The first examples of 1-D organic hybrid lanthanoid thioarsenates based on two [AsVS4]3− linkage modes
From the themed collection: Main Group Transformations
Open Access Paper

Salt metathesis versus protonolysis routes for the synthesis of silylamide Hauser base (R2NMgX; X = halogen) and amido-Grignard (R2NMgR) complexes

The effectiveness of simple synthetic routes to access silylamide Hauser base (R2NMgX; X = halogen) and amido-Grignard (R2NMgR) complexes from commercially available Grignard reagents is explored herein.

Graphical abstract: Salt metathesis versus protonolysis routes for the synthesis of silylamide Hauser base (R2NMgX; X = halogen) and amido-Grignard (R2NMgR) complexes
From the themed collection: Main Group Transformations
Open Access Paper

Reduction of dichloro(diaza-phospha)stibanes – isolation of a donor-stabilized distibenium dication

A bulky NPN-substituted dichlorostibane was reduced with KC8 to afford a distibenium compound with a [Sb2]2+ ion which can be regarded as a dimerization product of a stiba-phospha-diazanediyl singlet biradicaloid. The intermediate formation of this singlet stiba-phospha-diazanediyl was proven by trapping experiments.

Graphical abstract: Reduction of dichloro(diaza-phospha)stibanes – isolation of a donor-stabilized distibenium dication
From the themed collection: Main Group Transformations
Open Access Paper

Exploring structural and electronic effects in three isomers of tris{bis(trifluoromethyl)phenyl}borane: towards the combined electrochemical-frustrated Lewis pair activation of H2

Three B{C6H3(CF3)2}3 isomers have been studied, ortho-substituents quench FLP H2 cleavage via steric blocking and electron donation to the boron centre.

Graphical abstract: Exploring structural and electronic effects in three isomers of tris{bis(trifluoromethyl)phenyl}borane: towards the combined electrochemical-frustrated Lewis pair activation of H2
From the themed collection: Main Group Transformations
Paper

Synthesis and characterization of bis(imino)pyridine complexes of divalent Mg and Zn

The synthesis and electronic structure of bis(imino)pyridine (I2P) complexes of the divalent metal ions, Zn(II) and Mg(II) are reported, and a correlation between the ligand Cim–Cpy bond lengths with the ligand torsion angle is described. Structural comparison with a new complex of Al(III) and previously reported Al(III) complexes is included.

Graphical abstract: Synthesis and characterization of bis(imino)pyridine complexes of divalent Mg and Zn
From the themed collection: Main Group Transformations
Paper

Carbene insertion into a P–H bond: parent phosphinidene–carbene adducts from PH3 and bis(phosphinidene)mercury complexes

The insertion of an N-heterocyclic carbene into a P–H bond is the first step in a new synthesis of parent phosphinidene–carbene adducts from PH3. These adducts are used to generate bis(phosphinidene)mercury(II) complexes.

Graphical abstract: Carbene insertion into a P–H bond: parent phosphinidene–carbene adducts from PH3 and bis(phosphinidene)mercury complexes
From the themed collection: Main Group Transformations
Paper

Can main group systems act as superior catalysts for dihydrogen generation reactions? A computational investigation

The density functional theory (DFT) calculations reveal the potential of newly proposed main group germanium hydride systems to effect important chemical transformations, such as the catalytic cleavage of the O–H bond in water and alcohols, with significantly greater efficiency than the existing, state-of-the-art post-transition metal based systems.

Graphical abstract: Can main group systems act as superior catalysts for dihydrogen generation reactions? A computational investigation
From the themed collection: Main Group Transformations
Frontier

Efficient synthetic methods for the installation of boron–nitrogen bonds in conjugated organic molecules

New synthetic methods for preparing gram quantities BN analogs of polycyclic aromatic hydrocarbons are highlighted. Such methods are key to proper evaluation of these materials in device applications.

Graphical abstract: Efficient synthetic methods for the installation of boron–nitrogen bonds in conjugated organic molecules
From the themed collection: Main Group Transformations
53 articles

About this collection

Guest edited by: Professor Doug Stephan, University of Toronto, Canada, and Dr Rebecca Melen, Cardiff University, UK.

This themed issue focusses on the field of main group chemistry, covering a diverse array of developments and potential applications in fields ranging from catalysis to molecular electronics. These have often evolved from studies in fundamental chemistry such as studies of the chemistry of low oxidation state and/or low coordination number compounds of the main group elements, fundamental studies in Lewis-acid/Lewis-base reactivity, main group heterocycles, free radicals and studies of the bonding in main group compounds.

Spotlight

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