Solid-State and Dynamic Solution Behavior of a Cationic, Two-Coordinate Gold(I) π-Allene Complex
2010; American Chemical Society; Volume: 29; Issue: 19 Linguagem: Inglês
10.1021/om100688t
ISSN1520-6041
AutoresTimothy J. Brown, Atsushi Sugie, M.G. Dickens, Ross A. Widenhoefer,
Tópico(s)Cyclopropane Reaction Mechanisms
ResumoThe cationic gold π-allene complex {[P(t-Bu)2o-biphenyl]Au[η2-H2C═C═C(CH3)2]}+SbF6− was isolated in 98% yield from reaction of 3-methyl-1,2-butadiene with a mixture of [P(t-Bu)2o-biphenyl]AuCl and AgSbF6 and was characterized by X-ray crystallography and variable-temperature NMR spectroscopy. These studies revealed preferential binding of gold to the less substituted C═C bond of the allene in both the solid state and solution and also revealed fluxional behavior consistent with π-face exchange of the allene ligand via an η1-C2 allene intermediate or transition state.
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