Reactions of alkenylchromium reagents prepared from alkenyl trifluoromethanesulfonates (triflates) with chromium(II) chloride under nickel catalysis
作者:K. Takai、M. Tagashira、T. Kuroda、K. Oshima、K. Utimoto、H. Nozaki
DOI:10.1021/ja00279a068
日期:1986.9
inclination of other 17-electron metal carbonyl complexes to undergo associative ligand displacement reactions, it seems ironic that the incorporation of a pentadienyl ligand, which would be expected to promote associative attack via $ 73 coordination changes, should lead instead to a series of compounds for which much lower rates of substitution are observed and for which the substitutions also take place
这些配合物中的亲电性,其中钒在配合物 4 和 5 中表现出更大的亲电性。鉴于其他 17 电子金属羰基配合物倾向于进行缔合配体置换反应,似乎具有讽刺意味的是,加入戊二烯基配体,预计会通过 73 美元的配位变化促进缔合攻击,反而会导致一系列观察到低得多的取代率并且取代也通过解离方式发生的化合物。其他动力学、EPR 和结构研究正在进行中,以试图更好地了解这些 17 电子复合物的意外行为。