Why Are (NN2)Ni Pincer Complexes Active for Alkyl-Alkyl Coupling: β-H Elimination Is Kinetically Accessible but Thermodynamically Uphill
Why Are (NN2)Ni Pincer Complexes Active for Alkyl-Alkyl Coupling: β-H Elimination Is Kinetically Accessible but Thermodynamically Uphill
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DOI：
10.1021/om1007506
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发表时间：
2010-09-13
期刊：
影响因子：
2.8
通讯作者：
Hu, Xile
中科院分区：
文献类型：
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作者：
Breitenfeld, Jan;Vechorkin, Oleg;Hu, Xile
异构化和烯烃交换实验表明，在[(Me)NN_2)Ni-烷基]络合物中，β-H消除反应在动力学上是可行的，但在热力学上是不利的。捕集实验证实了镍氢化物物种的中间体作用。烷基配合物[((NN_2)-N-Me)Ni-丙基]催化烯烃异构化。
Isomerization and olefin exchange experiments show that beta-H elimination is kinetically viable but thermodynamically unfavorable in[((Me) NN2)Ni-alkyl] complexes. The intermediacy of Ni-hydride species was corroborated by a trapping experiment. The alkyl complex [((NN2)-N-Me)Ni-propyl] catalyzes olefin isomerization.