DIMETHYLALUMINUM AND GALLIUM AMINO ALKOXIDES

Dimethylaluminum and gallium alkoxides of the type Me2MOR were synthe sized (M=Al; R=CH(CH3)CH2NMe2 (1), CH(CH3)CH2NH2 (2), M = Ga; R = CH(C H3)CH2NMe2 (3)) by reaction of Me3M (M = Al; Ga) with the correspondin g amino alcohols, The resulting compounds 1-3 have been characterised by H-1, C-13 and Al-27 NMR spectroscopy. The crystal structures of 1-3 were determined by X-ray diffraction. Compounds 1-3 were proved to be dimeric in solid state containing five-membered heterocyclic rings. 3 crystallises in the monoclinic space group P2(1)/n with Z = 4, a = 7. 898(2), b = 15.512(9), c = 8.453(2) Angstrom, and beta = 103.70(2)degr ees, V = 1000.1(9)Angstrom(3). The Ga-N distance in 3 runs to 2.525(2) Angstrom which is significantly longer than the Al-N distances in the investigated Al compounds 1 and 2 (2.246(2) and 2.172(3)Angstrom).