title: Structural tungsten-imido chemistry: the gas-phase structure of W(NBut)2(NHBut)2 and the solid-state structures of novel heterobimetallic W/N/M (M = Rh, Pd, Zn) species.
abstract: The gas-phase (electron diffraction) and solid-state (X-ray) structures of W(NBut)2(NHBut)2 (1) have been determined. In the gas phase, 1 adopts both C1 and C2 conformations in a 69:31 ratio. The solid-state structure is disordered over two equal sites, both showing approximate C2 conformation as in the gas phase; the imido and amido centers are, however, clearly distinguished. Compound 1 has been used to synthesize novel heterobimetallic derivatives W(NBut)4[Rh(COD)]2 (3) and W(NBut)4[Pd(eta3-C3H5)]2 (4) via the dilithiated intermediate Li2[W(NBut)4] (2). In both cases, the [W(NBut)4] moiety bridges the two organometallic fragments. Reaction of 1 with Me2Zn has produced [Me(tBuN)W(mu-NBut)2ZnMe(NH2But)] (5). The structures of 3, 4, and 5 have been determined. Thermal decomposition of 4 under an autogenerated pressure at 700 degrees C has formed the hitherto uncharacterized bimetallic alloy WPd2.
authors.affiliation: Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.
authors.forename: Hamid
authors.initials: H
authors.lastname: Choujaa
authors.forename: Samuel D
authors.initials: SD
authors.lastname: Cosham
authors.forename: Andrew L
authors.initials: AL
authors.lastname: Johnson
authors.forename: Graeme R
authors.initials: GR
authors.lastname: Kafka
authors.forename: Mary F
authors.initials: MF
authors.lastname: Mahon
authors.forename: Sarah L
authors.initials: SL
authors.lastname: Masters
authors.forename: Kieran C
authors.initials: KC
authors.lastname: Molloy
authors.forename: David W H
authors.initials: DW
authors.lastname: Rankin
authors.forename: Heather E
authors.initials: HE
authors.lastname: Robertson
authors.forename: Derek A
authors.initials: DA
authors.lastname: Wann