title: Unusual thermal C-h bond activation by a tungsten allene complex.
abstract: Gentle thermolysis of the 18e alkyl-allyl complex, CpW(NO)(CH(2)CMe(3))(eta(3)-3,3-Me(2)C(3)H(3)) (1), generates a reactive 16e allene intermediate, CpW(NO)(eta(2)-CH(2)=C=CMe(2)) (A), with the concomitant evolution of neopentane via hydrogen abstraction from the dimethylallyl ligand. A has been structurally characterized as its PMe(3) adduct and is capable of effecting single and multiple C-H bond activations of hydrocarbon solvents. For example, the thermal reaction of 1 with cyclohexane leads to the formation of the 18e cyclohexenyl hydrido complex, CpW(NO)(eta(3)-C(6)H(9))(H) (5), as a result of three successive C-H activations of the alkane solvent.
authors.affiliation: Department of Chemistry, The University of British Columbia, Vancouver, Canada V6T 1Z1.
authors.forename: Stephen H K
authors.initials: SH
authors.lastname: Ng
authors.forename: Craig S
authors.initials: CS
authors.lastname: Adams
authors.forename: Peter
authors.initials: P
authors.lastname: Legzdins