Abstract
Di(tert-butyl)gallium hydride 1 dismutates partially in solution forming tri(tert-butyl)gallium 2 and the sesquihydride [(Me3C)2GaH]2[H2GaCMe3]2 (3). The loss of tert-butyl radicals upon irradiation of this mixture with day light or an UV lamp gave the hexagallium compound (Me3CGaGaCMe3)2(μ-H)2[μ-H2Ga(CMe3)2]2 (4), which possesses two Ga–Ga single bonds. These Ga2 groups are bridged by two hydrogen atoms to give a six-membered Ga4H2 heterocycle. Couples of opposite gallium atoms of this heterocycle are bridged via Ga–H–Ga 3c–2e bonds by two H2Ga(CMe3)2 ligands, which are situated above and below the molecular plane. Compound 4 may be described as a hypho-hexagallane(14) cluster compound.
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