Synthetic, structural and spectroscopic studies of (pseudo)halo(1,3-di-tert-butylimidazol-2-ylidine) gold complexes

被引:118
作者
Baker, MV [1 ]
Barnard, PJ [1 ]
Brayshaw, SK [1 ]
Hickey, JL [1 ]
Skelton, BW [1 ]
White, AH [1 ]
机构
[1] Univ Western Australia, Crawley, WA 6009, Australia
关键词
D O I
10.1039/b412540a
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A series of (pseudo) halo(1,3-di-tert-butylimidazol-2-ylidine) gold complexes [(But(2)Im) AuX] (X = Cl, Br, I, CN, N-3, NCO, SCN, SeCN, ONO2, OCOCH3, CH3) have been synthesized and characterised spectroscopically and structurally. C-13 NMR chemical shifts for the carbene carbon vary widely with differing ancillary anion, correlating well with the sigma-donor ability of the latter and with the M-C-(carbene) bond distance. These results reinforce the notion that N-heterocyclic carbene ligands are primarily sigma-donor ligands with little pi-acceptor ability.
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页码:37 / 43
页数:7
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