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Preparation and characterization of bis-(trimethylsilyl) aminoalanes [H2AlN(SiMe3)2] · NMe3 and {HAl[N(SiMe3) 2]2}n crystal structure determination for tris-(trimethylsilyl) alane trimethylamine adduct (Me3Si) 3Al · NMe3

1997; Elsevier BV; Volume: 539; Issue: 1-2 Linguagem: Inglês

10.1016/s0022-328x(97)00004-1

1872-8561

Jerzy F. Janik, Eileen N. Duesler, Robert T. Paine,

Organoboron and organosilicon chemistry

The adduct [H2AlN(SiMe3)2] · NMe3 (1) is obtained in high yield from the reaction between H3Al · NMe3 and HN(SiMe3)2. Thermal decomposition of 1 results in disproportionation with formation of hydrogen, free NMe3, elemental aluminum, and {HAl[N(SiMe3)2]2}n (2). Attempted synthesis of a copolymer from the reaction of [H2AlN(SiMe3)2] · NMe3 (1) with [(Me3Si)2AlNH2]2 results in the unexpected formation of tris-(trimethylsilyl)alane trimethylamine adduct, (Me3Si)3Al · NMe3 (3), for which the crystal structure was determined: monoclinic, space group P21/n, a= 8.9770(10)Å, b = 15.930(3)Å, c = 15.980(3)Å, V = 2285.1(10)Å3, Z = 8, D = 0.888 gcm−3, R = 7.07%.