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- W2327431075 abstract "The alkylidyne complex (C5Me5)Ta(≡CPh)(PMe3)2Cl (1) was first reported by Schrock in 1978, but little if any follow-up work on 1 or other group 5 metal alkylidynes has been reported. This work discloses two avenues of reactivity of 1. Treatment of 1 with 3-hexyne resulted in the formation of a tantalacyclobutadiene. Abstraction of chloride from 1 led to a mixture of products that included isomers of [(C5Me5)Ta(═CHPh)(CH2PMe2)(PMe3)]+ (4), in which a C–H bond of a PMe3 ligand was added across the Ta≡C bond. The C–H activation was found to be reversible, and the equilibrium mixture functioned as an equivalent of a cationic Ta alkylidyne in reaction with 3-hexyne, producing a cationic tantalacyclobutadiene (6). Compounds 4 and 6 were structurally characterized in the solid state by XRD methods, with 6 being the first structurally characterized metallacyclobutadiene in group 5." @default.
- W2327431075 created "2016-06-24" @default.
- W2327431075 creator A5029906433 @default.
- W2327431075 creator A5070176665 @default.
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- W2327431075 date "2015-04-02" @default.
- W2327431075 modified "2023-10-12" @default.
- W2327431075 title "Cycloaddition and C–H Activation Reactions of a Tantalum Alkylidyne" @default.
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- W2327431075 doi "https://doi.org/10.1021/acs.organomet.5b00205" @default.
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