digallane
Sign in to saveDigallane (systematically named digallane(6)) is an inorganic compound with the chemical formula (also written or ). It is the dimer of the monomeric compound gallane. The eventual preparation of the pure compound, reported in 1989, was hailed as a "tour de force." Digallane had been reported as early as 1941 by Wiberg; however, this claim could not be verified by later work by Greenwood and others. This compound is a colorless gas that decomposes above 0 °C.
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Digallane (systematically named digallane(6)) is an inorganic compound with the chemical formula (also written {{Chem2|[{GaH2(μ\-H)}2]}} or ). It is the dimer of the monomeric compound gallane. The eventual preparation of the pure compound, reported in 1989, was hailed as a "tour de force." Digallane had been reported as early as 1941 by Wiberg; however, this claim could not be verified by later work by Greenwood and others. This compound is a colorless gas that decomposes above 0 °C.
__TOC__ ==Preparation== A two-stage approach proved to be the key to successful synthesis of pure digallane. Firstly the dimeric monochlorogallane, (containing bridging chlorine atoms and thus formulated as () was prepared via the hydrogenation of gallium trichloride, , with trimethylsilane, . This step was followed by a further reduction with (lithium tetrahydrogallate), solvent free, at −23 °C, to produce digallane, in low yield.