and 0.890 Å, respectively. Complexes of type [MCl(COD)(1)] (where M = Rh and Ir) were prepared and characterized using spectroscopic and crystallographic methods. The donor strength of this new carbene was determined by IR spectroscopy (νav) and cyclic voltammetry (E1/2). Preliminary catalytic studies show that the new carbene is a suitable ligand for rhodium and iridium catalysts in the hydrosilylation
一种新的N-杂环卡宾,其包含稠合的苯并
噻二唑(BTD)部分,5,7-双(
1,1-二甲基乙基)-5 H-
咪唑并[4,5- f ] -
2,1,3-苯并噻二唑-6-亚lide(1通过使相应的四
氟硼酸盐去质子化而产生)。从市售的1,2-
苯二胺可以六步得到盐前体。发现该卡宾在惰性条件下是稳定的,并且通过NMR光谱充分表征。还合成并充分表征了该卡宾的
硫加合物。
硫酮的X射线结构分析表明,卡宾碳和
硫原子分别偏离含有BTD部分和
咪唑环的两个氮原子的平面0.231和0.890Å。制备了[MC1(COD)(1)]型配合物(其中M = Rh和Ir),并使用光谱和晶体学方法对其进行了表征。这种新卡宾的供体强度通过红外光谱测定(ν AV)和循环伏安法(E 1/2)。初步的催化研究表明,新的卡宾是
苯乙酮氢化
硅烷化中
铑和
铱催化剂的合适
配体。