C(sp3)-H Bond Activation by Vinylidene Gold(I) Complexes: A Concerted Asynchronous or Stepwise Process?
C(sp3)-H Bond Activation by Vinylidene Gold(I) Complexes: A Concerted Asynchronous or Stepwise Process?
复制标题
DOI:
10.1002/chem.201703815
复制
发表时间:
2017-11-13
影响因子:
4.3
通讯作者:
Hashmi, A. Stephen K.
中科院分区:
文献类型:
--
作者:
Klein, Johannes E. M. N.;Knizia, Gerald;Hashmi, A. Stephen K.
A detailed analysis of the C(sp(3))-H activation process by vinylidene Au-I complexes is described based on an intrinsic bond orbital analysis. Based on our analysis this event can be divided into three phases: (i) hydride transfer, (ii) C-C bond formation, and (iii) sigma to pi rearrangement of the lone pair coordinated to Au. Small perturbations of the system lead to either a concerted asynchronous reaction, or a stepwise reaction featuring an intermediate with a C-H-C three-centre two-electron (3c-2e) bond. The role of pi-donating substituents is highlighted and provides a way of controlling reactions of this type in future experimental studies.