Decomposition of monochlorogallane, [H2GaCl]n, and adducts with amine and phosphine bases: Formation of cationic gallane derivatives

C Y Tang, A J Downs, T M Greene, S Marchant, S Parsons

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Thermal decomposition of monochlorogal lane, [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, Ga-4-[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 center dot GaH2Cl (2), but also 2:1 amine complexes which prove to be cationic gallane derivatives, [H2Ga(NH2R)(2)]+Cl-, where R = Bu-t (3a) or Bu-s (3b). All three of these complexes have been characterized crystallographically at 150 K.

Original languageEnglish
Pages (from-to)7143-7150
Number of pages8
JournalInorganic Chemistry
Issue number20
Publication statusPublished - 3 Oct 2005

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