is observed at temperatures above ca. −20 °C. An s-trans diene complex is formed upon coordination of DMBD. Hydrogen transfer is observed when complex 2 is exposed to 1-hexene or cyclopentadiene to generate new allyl nickel complexes and 1 equiv of cyclohexene. Polymerization of 1,3-CHD and DMBD with 2 is described, and a coupling product formed between DMBD and 2 is observed and characterized.
配合物[(
环己烯基)Ni(NCMe)2 ] [B(Ar F)4 ](1)和[(
环己烯基Ni(
均三甲苯)] [B(Ar F)4 ](2)的合成和表征为报告。在腈配位体的抽象1与B(C 6 ˚F 5)3倍的产率是“无
配体的” [(
环己烯基)
镍II ] +可与1,3-二烯配位的物种,包括
丁二烯(BD),
异戊二烯(IP),
1,3-环己二烯(1,3-CHD),
1,4-环己二烯(1,4-CHD)和2,3 -二甲基-
1,3-丁二烯(
DMBD)在低温下。在高于约200℃的温度下观察到二烯插入。-20°C。一个S-反式二烯复合物在
DMBD协调形成。当络合物2暴露于
1-己烯或
环戊二烯以生成新的烯丙基
镍络合物和1当量的
环己烯时,观察到氢转移。描述了1,3-CHD和
DMBD与2的聚合,并且观察和表征了在
DMBD和2之间形成的偶联产物。