Syntheses, kinetics, and mechanism of ligand substitution reactions of 17-electron cyclopentadienyl and pentadienyl vanadium carbonyl complexes
作者:Ruth M. Kowaleski、Fred Basolo、William C. Trogler、Robert W. Gedridge、Timothy D. Newbound、Richard D. Ernst
DOI:10.1021/ja00250a018
日期:1987.8
triethylphosphine compounds. The CO substitution lability in the complexes (eta/sup 5/-L)/sub 2/ VCO (L = C/sub 5/H/sub 5/, C/sub 5/Me/sub 5/, C/sub 5/H/sub 7/, 2,4-C/sub 7/H/sub 11/) was investigated. The exchange reaction of (eta/sup 5/-C/sub 5/H/sub 5/)/sub 2/V/sup 13/CO or of (eta/sup 5/-C/sub 5/Me/sub 5/)/sub 2/V/sup 13/CO with CO is first-order in both CO and metal complex: for L = C/sub 5/Me/sub 5/,
报道了双(eta/sup 5/-戊二烯基)钒羰基化合物和相应的三乙基膦化合物的合成。复合物中的 CO 取代不稳定性 (eta/sup 5/-L)/sub 2/ VCO (L = C/sub 5/H/sub 5/, C/sub 5/Me/sub 5/, C/sub 5 /H/sub 7/, 2,4-C/sub 7/H/sub 11/) 进行了研究。(eta/sup 5/-C/sub 5/H/sub 5/)/sub 2/V/sup 13/CO或(eta/sup 5/-C/sub 5/Me/sub 5)的交换反应/)/sub 2/V/sup 13/CO 与 CO 在 CO 和金属络合物中都是一级的:对于 L = C/sub 5/Me/sub 5/,甲苯中的动力学参数为 ..delta..H /sub 2//sup double dagger/ = 8.9 +/- 0.7 kcal/mol, ..delta