β-C–H interaction vs. Dihaptoacyl co-ordination in a molybdenum acetyl complex. X-Ray crystal structure of [Mo(Ac)(S2CNMe2)(CO)-(PMe3)2]
Abstract
N.m.r. and X-ray studies of the title compound, obtained from [MoCl(η2-COCH2SiMe3)(CO)(PMe3)3] and NaS2CNMe2 in aqueous acetone, indicate that molybdenum atom attains an 18-electron configuration by interacting with a β-C–H bond [Mo–C 2.60(1), Mo–H 2.06(9)Å] rather than by dihapto co-ordination to the acetyl group.