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- W2073764265 endingPage "10714" @default.
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- W2073764265 abstract "The hydrodefluorination (HDF) of fluoroalkenes in the presence of a variety of titanium catalysts was studied with respect to scope, selectivity, and mechanism. Optimization revealed that the catalyst requires low steric bulk and high electron density; secondary silanes serve as the preferred hydride source. A broad range of substrates yield partially fluorinated alkenes, such as previously unknown (Z)-1,2-(difluorovinyl)ferrocene. Mechanistic studies indicate a titanium(III) hydride as the active species, which forms a titanium(III) fluoride by H/F exchange with the substrate. The HDF step can follow both an insertion/elimination and a σ-bond metathesis mechanism; the E/Z selectivity is controlled by the substrate. The catalysts’ ineffieciency towards fluoroallenes was rationalized by studying their reactivity towards Group 6 hydride complexes." @default.
- W2073764265 created "2016-06-24" @default.
- W2073764265 creator A5005419455 @default.
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- W2073764265 date "2012-07-09" @default.
- W2073764265 modified "2023-09-27" @default.
- W2073764265 title "Titanium-Catalyzed Vinylic and Allylic CF Bond Activation-Scope, Limitations and Mechanistic Insight" @default.
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