SCHEDULED MAINTENANCE
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.
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