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The international journal for inorganic, organometallic and bioinorganic chemistry
Paper
Dalton Trans., 2006, 203 - 212, DOI: 10.1039/b512741f
Olefination and group transfer reactions of an electron deficient tantalum methylidene complex
Sarah M. Mullins, Robert G. Bergman and John Arnold
The reactivity of an electronically unsaturated tantalum methylidene complex [TolC(NSiMe3)2]2Ta(CH2)CH3 ( 1) supported by [TolC(NSiMe3)2] amidinate ligands is described. Electrophilic addition and olefination reactions of the Ta
CH2 functionality are reported. Alkylidene 1 participates in group-transfer reactions not observed in sterically similar, but electronically saturated, analogues. Reactions with substrates containing unsaturated C–X (X = C, N, O) bonds yield [Ta]X compounds and vinylated organic products; carbon–sulfur cleavage reactions to produce tantalum thioformaldehyde and tantalum sulfido complexes.
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