B(C6F5)3 Activation of Oxo Tungsten Complexes That Are Relevant to Olefin Metathesis

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• 作者：Dmitry V. Peryshkov ; William P. Forrest ; Richard R. Schrock ; Stacey J. Smith ; Peter M眉ller
• 刊名：Organometallics
• 出版年：2013
• 出版时间：October 14, 2013
• 年：2013
• 卷：32
• 期：19
• 页码：5256-5259
• 全文大小：252K
• 年卷期：v.32,no.19(October 14, 2013)
• ISSN：1520-6041

文摘

We have found that coordination of B(C₆F₅)₃ to an oxo ligand in tungsten oxo alkylidene bis(aryloxide) complexes, where the aryloxide is O-2,6-(mesityl)₂C₆H₃ (HMTO) or 2,6-diadamantyl-4-methylphenoxide (dAdPO), accelerates the formation of metallacyclobutane complexes from alkylidenes as well as the rearrangement of metallacyclobutane complexes. In contrast, a tungstacyclopentane complex, W(O)(C₄H₈)(OHMT)₂, is relatively stable toward rearrangement in the presence of B(C₆F₅)₃. A careful balance of steric factors allows a single isomer of W(O)(trans-4,4-dimethylpent-2-ene)(dAdPO)₂ to be formed from W(O)(CH-t-Bu)(dAdPO)₂ in the presence of both ethylene and B(C₆F₅)₃.