过渡金属氢化物和聚集双键化合物反应的研究Ⅲ．用ESR方法考察二茂锆氢化物与RNCS的反应机理

STUDIES ON REACTIONS OF TRANSITION -METAL HYDRIDES WITH TETEROCUMULENES Ⅲ. An ESR Evidenee for Paramagnatic Zirconium Species Generated during the Reaction of Cp_2Zr（H）Cl with RNCS

本文用ＥＳＲ方法考察了Ｃｐ＿２Ｚｒ（Ｈ）Ｃｌ与ＲＮＣＳ（Ｒ＝Ｃ＿６Ｈ＿５，ｃ－Ｃ＿６Ｈ＿（１１），ｎ－Ｃ＿４Ｈ＿９）的反应的过程，结果表明，在这类反应过程中，Ｚｒ－Ｈ键发生均裂，中心金属锆经过＋４─→＋３─→＋４的价态变化，反应通过自由基机理进行．

The reaction process of Cp_2Zr（H）Cl with RNCS （R=C_6H_5，c-C_6H_(11),n-C)4H_9）hasbeen detected by ESR method． The ESR results show that in the process the Zr-Hbond deaved homolytically and a transient Zr（Ⅲ）species is formed． The reactionsoeeurred via a radical mechanism.