The synthesis and structural characterization of bis(mercaptoimidazolyl)hydroborato complexes of lithium, thallium and zinc †
作者:Clare Kimblin、Brian M. Bridgewater、Tony Hascall、Gerard Parkin
DOI:10.1039/a908411h
日期:——
Bidentate [S2]-donor bis(mercaptoimidazolyl) ligands, [BmMe]− and [BmMes]−, have been synthesized by reaction of [BH4]− with 2-mercapto-1-methylimidazole and 2-mercapto-1-mesitylimidazole, respectively. Subsequent treatment with ZnX2 (X = Me, I, NO3) yields a series of 1∶1 [BmR]ZnX complexes, namely [BmMe]ZnMe, [BmMe]ZnI and [BmMes]Zn(NO3), each of which possesses 3-center–2-electron [Zn⋯H–B] interactions. The homoleptic complex, [BmMe]2Zn, may be obtained by a redistribution reaction of [BmMe]ZnMe in CHCl3, and possesses a tetrahedral zinc center which is devoid of a 3-center–2-electron [Zn⋯H–B] interaction.
二齿[S2]供体双(巯基咪唑)配体,[BmMe]− 和 [BmMes]−,已分别通过[BH4]−与2-巯基-1-甲基咪唑和2-巯基-1-甲基咪唑的反应合成。随后与ZnX2(X = Me,I,NO3)处理,得到一系列1:1的[BmR]ZnX配合物,即[BmMe]ZnMe,[BmMe]ZnI和[BmMes]Zn(NO3),每个配合物都具有3中心-2电子的[Zn⋯H–B]相互作用。通过[BmMe]ZnMe在CHCl3中的重分配反应,可以得到仅含[BmMe]配体的配合物[BmMe]2Zn,其拥有一个不含3中心-2电子[Zn⋯H–B]相互作用的四面体锌中心。