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Type: Journal article
Title: N-heterocyclic carbene coordinated gallanes and chlorogallanes
Author: Cole, Marcus Lawford
Furfari, Samantha Kathleen
Kloth, Marc
Citation: Journal of Organometallic Chemistry, 2009; 694(18):2934-2940
Publisher: Elsevier Science
Issue Date: 2009
ISSN: 0022-328X
School/Discipline: School of Chemistry and Physics
Statement of
Marcus L. Cole, Samantha K. Furfari and Marc Kloth
Abstract: The preparation of the N-heterocyclic carbene coordinated gallium complexes [GaH3(IXy)] (1), [GaH3(IDipp)] (2), [GaClH2(IMes)] (3) and [GaCl2H(IMes)] (4), where IXy = 1,3-bis(2,6-dimethylphenyl)imidazol-2-ylidene, IDipp = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene and IMes = 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene, are reported. All four complexes have been characterised by 1H, 13C NMR and IR spectroscopy and, for complexes 2, 3 and 4, single crystal X-ray structure determination. These compounds represent some of the most thermally stable molecular gallium hydrides known, with 4 being the most thermally stable gallium hydride reported (dec. 274 °C). These remarkable thermal stabilities translate to significant aerobic stability such that all four compounds may be handled in dry air without significant decomposition. Compounds 2, 3 and 4 exist as distorted tetrahedra in the solid state with gallium to carbene C-donor bonds that shorten with increasing Lewis acidity of the gallium centre. Compound 2 co-crystallizes with 1 equiv. of 2,6-diisopropylphenylaniline and exhibits several weak intermolecular bonding interactions in the solid-state.
Keywords: Gallium ; Halide ; Hydride ; Structure determination ; Infrared spectroscopy
Description: Copyright © 2009 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.jorganchem.2009.04.030
Appears in Collections:Chemistry and Physics publications

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