title: Generation of dimethylsilylene and allylidene holmium complexes from trimethylsilylated allyl ligands.
abstract: The reaction of K[1,3-(SiMe3)2C3H3] with partially hydrated holmium triflate leads to a dimeric complex (1) in which hydrogen abstraction from a trimethylsilyl group has occurred on two allyl ligands, forming dimethylsilylene units that bridge the holmium atoms. When the reaction time is prolonged, a different product (2) is isolated, in which in addition to two dimethylsilylene bridges, the metal centers are joined with a mu-eta1,eta3-allylidene ligand. Both crystallographic and computational studies provide evidence for delocalized bonding in the allylidene fragment.
authors.affiliation: Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA.
authors.forename: Rosemary E
authors.initials: RE
authors.lastname: White
authors.forename: Timothy P
authors.initials: TP
authors.lastname: Hanusa
authors.forename: Benjamin E
authors.initials: BE
authors.lastname: Kucera