The Initiation Reaction of Hoveyda–Grubbs Complexes with Ethene
The Initiation Reaction of Hoveyda–Grubbs Complexes with Ethene
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HoveydaâGrubbs 配合物与乙烯的引发反应
DOI:
10.1021/acscatal.8b03445
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发表时间:
2019
期刊:
影响因子:
12.9
通讯作者:
H. Plenio
中科院分区:
文献类型:
--
作者:
N. Peschek;K.-J. Wannowius;H. Plenio
The initiation reactions of the three Hoveyda–Grubbs complexes (GH(H),GH(4-NO2), andGH(5-NO2)) with ethene were studied via UV–vis spectroscopy. The unsubstituted complexGH(H)initiates approximately 5 times slower with ethene than with 1-hexene, and the electron-deficientGH(4-NO2)andGH(5-NO2)initiates 1.2 and 1.7 times slower with ethene than with 1-hexene. A detailed multiwavelength analysis of the absorbance–time traces reveals the multistep nature of the reaction of the Hoveyda–Grubbs complexes with ethene. In addition to the established rate constantk1(being first order in ethene), two additional,c(olefin) independent reactionsk2andk3were identified:k2depends on the nature of the GH precatalyst, whilek3is nearly independent of the precatalyst. The reaction associated withk1precedes the fasterk2leading to low stationary concentration of an intermediate formed from the respective Hoveyda–Grubbs complex and ethene, corresponding to a postinitiation species.
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影响因子:
15
作者:
Meek, Simon J.;Malcolmson, Steven J.;Li, Bo;Schrock, Richard R.;Hoveyda, Amir H.
通讯作者:
Hoveyda, Amir H.
影响因子:
--
作者:
R. Kadyrov
通讯作者:
R. Kadyrov
影响因子:
15
作者:
César A. Urbina;A. Poater;T. Lebl;Simone Manzini;A. Slawin;L. Cavallo;S. Nolan
通讯作者:
S. Nolan
影响因子:
12.9
作者:
Luo, Shao-Xiong;Engle, Keary M.;Grubbs, Robert H.
通讯作者:
Grubbs, Robert H.
影响因子:
15
作者:
Hong, Soon Hyeok;Wenzel, Anna G.;Grubbs, Robert H.
通讯作者:
Grubbs, Robert H.