Benzannulated tris(2-mercapto-1-imidazolyl)hydroborato ligands: tetradentate κ<sup>4</sup>-S<sub>3</sub>H binding and access to monomeric monovalent thallium in an [S<sub>3</sub>] coordination environment
作者:Yi Rong、Joshua H. Palmer、Gerard Parkin
DOI:10.1039/c3dt52418c
日期:——
demonstrates that the three sulfur donors of the [TmRBenz] ligands of both [TmMeBenz]Tl and [TmButBenz]Tl chelate to thallium. This coordination mode is in marked contrast to that in other [TmR]Tl compounds, which exist as dinuclear molecules wherein two of the sulfur donors coordinate to different thallium centers. As such, this observation provides further evidence that benzannulation promotes κ3-S3
通过NaBH 4与 1-叔丁基-1,3-二氢-2 H-苯并咪唑-2-硫酮反应合成了苯并环化的三(巯基咪唑基)硼氢化钠复合物 [Tm Bu t Benz ]Na ,同时[Tm MeBenz ]K 是通过KBH 4与 1-methyl-1,3-dihydro-2 H -benzimidazole-2-thione反应合成的。溶剂化加合物的分子结构,[Tm Bu t Benz ]Na(THF)} 2 (μ-THF) 2和 [Tm MeBenz ]K(OCMe 2 ) 3,已通过 X 射线衍射确定,这表明这些配合物中的 [Tm R ] 配体采用与 [Tm MeBenz ]Na} 2 (μ-THF) 3 中的配位模式不同的配位模式。具体而言,钠配合物[Tm MeBenz ]Na} 2 (μ-THF) 3的[Tm MeBenz ]配体采用κ 3 - S 3配位模式,而钾配合物[Tm MeBenz