کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1325827 | 977404 | 2008 | 9 صفحه PDF | دانلود رایگان |
The detailed mechanisms for reaction of Cp2ZrH2 with cis-2-butene were explored with the aid of density functional theory calculations. Two possible pathways for olefin insertion into the Zr–H of Cp2ZrH2 were proposed. One is the side-insertion and the other is the central-insertion. The central-insertion is theoretically predicted to be more favorable kinetically than the side-insertion. It is revealed that formation and cleavage of Zr⋯H–C agostic interaction and β-hydrogen elimination are requisite steps in addition to the olefin insertions. The side-agostic and the central-agostic interactions are found to be involved in some intermediates. The former agostic is less stable than the latter, which plays a role in describing which path is preferred.
The mechanisms for both the side-insertion and the central-insertion of cis-2-butene into the Zr–H bond of Cp2ZrH2 to give Cp2Zr(H)(CH2CH2CH2CH3) are theoretically investigated with the aid of DFT calculations.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 693, Issue 11, 15 May 2008, Pages 2052–2060