Some past achievements and future perspectives in main group chemistry

Cowley, Alan H.

doi:10.1016/j.jorganchem.2004.05.007

Cited by 29 publications

(24 citation statements)

References 76 publications

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“…Their calculations on the amino-substituted derivative H 2 NB = BNH 2 showed that its singlet ground state is approximately 18 kcal mol À1 lower in energy than the triplet state. [18] Numerous enterprises have been undertaken by experimentalists to synthesize and characterize a stable diaminodiborene(2); in two cases, mass spectrometric data, 11 B NMR spectroscopy studies, and/or trapping reactions suggested the formation of diamino diborenes (2). Conclusive evidence, however, has not been supplied in these reports.…”

Section: Methodsmentioning

confidence: 99%

“…During the last 30 years, stable electroneutral compounds with homonuclear low-valent bonding have been made accessible for all elements from Groups 13 to 15 except for boron (until very recently) [1] and aluminum. [2] The inherently electron-deficient nature of Group 13 elements, especially boron, explains their preference to engage in multicenter bonding (e.g. in polyhedral borane clusters) [3] rather than to form stable p bonds.…”

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confidence: 99%

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A Base‐Stabilized Neutral BB Bond: Closing a Gap by Filling the Void

Scheschkewitz¹

2008

Angew Chem Int Ed

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

A Base‐Stabilized Neutral BB Bond: Closing a Gap by Filling the Void

Scheschkewitz¹

2008

Angew Chem Int Ed

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“…The group 3 metal atoms have been used as important building blocks in the synthesis of supramolecular compounds. Aluminum, gallium and indium are generally found as trivalent cations and thus tend to create complexes with O, N-chelating ligands [11].…”

Section: Introductionmentioning

confidence: 99%

The effect of ligand substituent on crystal packing: Structural and theoretical studies of two Ga(III) supramolecular compounds

Soleimannejad

Nazarnia²

2016

Journal of Molecular Structure

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A new Ga(III) supramolecular compound (4,4´-bipyH 2)[Ga(hpydc) 2 ] 2 .7H 2 O (2) (where H 2 hpydc = 4hydroxy-pyridine-2,6-dicarboxylic acid and 4,4´-bipy = 4,4´-bipyridine) was synthesized using the proton transfer reaction. Compound 2 was structurally characterized using single crystal X-ray diffraction, and it was shown that its asymmetric unit consists of two independent anionic Ga(III) complexes, one fully protonated 4,4´-bipyridine and seven uncoordinated water molecules. In order to understand the effect of pyridine OH substituent on supramolecular interactions and crystal packing, compound 2 was compared with (bipyH 2)[Ga(pydc) 2 ].(H 2 pydc).4H 2 O (1) (where H 2 pydc = pyridine-2,6-dicarboxylic acid), that does not have an OH group on the pyridine ligand. The Density Functional Theory (DFT) and Natural Bond Orbital (NBO) calculations and also Atoms in Molecules (AIM) analysis were used to analyze the non-covalent interactions in both complexes. The calculation of non-covalent interactions' energy provides a useful means to investigate their effects in the crystal packing.

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“…By definition, elements in unusually-low oxidation or valence states are more electron-rich than their more typical oxidation state relatives and the compounds in which they are found often exhibit interesting or unique structural properties, bonding descriptions and reactivity patterns [1]. Consequently, investigations into the chemistry of compounds containing low-oxidation state centers have often been hindered by the relative instability or highlyreactive nature of the compounds and it has been through the groundbreaking efforts of pioneers such as Alan H. Cowley that the field has developed and flourished [2][3][4].…”

Section: Introductionmentioning

confidence: 99%