Kinetics and mechanism of diene exchange at six-co-ordinate chromium
作者:Denis T. Dixon、Philip M. Burkinshaw、James A. S. Howell
DOI:10.1039/dt9800002237
日期:——
tetracarbonylchromium and tetracarbonyl(trans,trans-hexa-2,4-diene)chromium with cyclo-octa-1,5-diene(cod), norbornadiene (nbd), and P(OR′)3(R′= Me or Ph) to yield [Cr(cod)(CO)4], [Cr(nbd)(CO)4, and [Cr(CO)4P(OR′)3}2] are consistent with a mechanism involving a stepwise displacement of the diene ligand, which is SN1 in nature for the dieneexchange but contains a ligand-dependent SN2 component in the case
(buta-1,3-diene)四羰基铬和四羰基(反式,反式-hexa-2,4-diene)铬与环-octa-1,5-diene的配体交换和取代反应的动力学研究结果(cod),降冰片二烯(nbd)和P(OR')3(R'= Me或Ph)生成[Cr(cod)(CO)4 ],[Cr(nbd)(CO)4和[Cr (CO)4 P(OR')3 } 2 ]与涉及逐步转移二烯配体的机理是一致的,二烯配体在本质上是用于二烯交换的S N 1但在其中含有配体依赖性S N 2组分被亚磷酸酯取代的情况。