title: Intramolecular Hydrogen Site Exchange in an HRu(SiHPh(2)) Moiety.
abstract: RuH(Ph)(CO)L(2) (L = P(t)Bu(2)Me) reacts with SiH(2)Ph(2) to give first benzene and RuH(SiHPh(2))(CO)L(2), and then RuH(3)(SiHPh(2))(CO)L(2) and Ru(H)(2)(CO)L(2), the trihydride being formed by a dehydrogenative silane coupling reaction when excess SiH(2)Ph(2) is present. Variable-temperature spin saturation transfer experiments reveal exchange between H(a) and H(b) in RuH(a)(SiH(b)Ph(2))(CO)L(2); this occurs both by an intramolecular mechanism and (when SiH(2)Ph(2) is present) by a mechanism dependent on SiH(2)Ph(2) concentration. Spin saturation transfer also reveals exchange between all three of the above complexes via addition/loss of SiH(2)Ph(2) or H(2).
authors.affiliation: Department of Chemistry, Indiana University, Bloomington, Indiana 47405-4001.
authors.forename: Dmitry G.
authors.initials: DG
authors.lastname: Gusev
authors.forename: T. Timothy
authors.initials: TT
authors.lastname: Nadasdi
authors.forename: Kenneth G.
authors.initials: KG
authors.lastname: Caulton