title: 1,1,3,3-Tetramethylguanidine-gallane, (Me2N)2CN(H).GaH3: an unusually strongly bound gallane adduct.
abstract: The novel adduct 1,1,3,3-tetramethylguanidine-gallane, (Me2N)2CN(H).GaH3, has been prepared by the reaction of [(Me2N)2CNH2]+Cl- with LiGaH4 in Et2O solution. Its spectroscopic properties indicate a monomeric species with an unusually strong coordinate link between the imido function and GaH3, an inference confirmed by the crystal structure at 150 K which also reveals significant secondary interactions through non-classical N-H...H-Ga bridges. Despite the intrinsic strength of the Ga-N bond, however, vaporisation at ca. 310 K occurs with partial dissociation, and decomposition via more than one pathway proceeds at temperatures >330-350 K to give a variety of products, including the free base, Me2NH, H2, and a novel gallium-nitrogen compound composed of a Ga4N4 cubane-like core bridged on three edges by -N{C(NMe2)2}GaH2- units.
authors.affiliation: Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK.
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Cowley
authors.forename: Anthony J
authors.initials: AJ
authors.lastname: Downs
authors.forename: Hans-Jorg
authors.initials: HJ
authors.lastname: Himmel
authors.forename: Sarah
authors.initials: S
authors.lastname: Marchant
authors.forename: Simon
authors.initials: S
authors.lastname: Parsons
authors.forename: Justin A
authors.initials: JA
authors.lastname: Yeoman