title: Decomposition of monochlorogallane, [H2GaCl]n, and adducts with amine and phosphine bases: formation of cationic gallane derivatives.
abstract: Thermal decomposition of monochlorogallane, [H2GaCl]n, at ambient temperatures results in the formation of subvalent gallium species. To Ga[HGaCl3], previously reported, has now been added a second mixed-valence solid, Ga4[HGaCl3]2[Ga2Cl6] (1), the crystal structure of which at 150 K shows a number of unusual features. Adducts of monochlorogallane, most readily prepared from the hydrochloride of the base and LiGaH4 in appropriate proportions, include not only the 1:1 molecular complex Me3P.GaH2Cl (2), but also 2:1 amine complexes which prove to be cationic gallane derivatives, [H2Ga(NH2R)2]+Cl-, where R = tBu (3a) or sBu (3b). All three of these complexes have been characterized crystallographically at 150 K.
authors.affiliation: Inorganic Chemistry Laboratory, University of Oxford, UK.
authors.forename: Christina Y
authors.initials: CY
authors.lastname: Tang
authors.forename: Anthony J
authors.initials: AJ
authors.lastname: Downs
authors.forename: Tim M
authors.initials: TM
authors.lastname: Greene
authors.forename: Sarah
authors.initials: S
authors.lastname: Marchant
authors.forename: Simon
authors.initials: S
authors.lastname: Parsons