The ansa-effect, as it applies to tantalocene chemistry, has been investigated by a comparison of the chemistry of [Me2Si(C5Me4)2]TaH3 and [Me2Si(C5Me4)2]Ta(η2-C2H4)H with their permethyltantalocene counterparts; these studies demonstrate that incorporation of the [Me2Si] ansa bridge substantially enhances the rates of both reductive elimination of H2 and ethylene-insertion into a TaâH bond.
通过比较 [Me2Si(C5Me4)2]TaH3 和 [Me2Si(C5Me4)2]Ta(β2-
C2H4)H 与其全甲基
钽茂的
化学性质,研究了适用于
钽茂
化学的 ansa 效应同行;这些研究表明,[Me2Si] ansa 桥的掺入大大提高了 H2 的还原消除率和
乙烯插入 Ta–H 键的速率。