The reaction between GaCl(3) and 1 equiv of HN(SiMe(2)Ph)(2) in CH(2)Cl(2) solution affords colorless crystals of [Cl(2)Ga[mu-N(H)SiMe(2)Ph]](2) (1). The related reaction between GaCl(3) and 1 equiv of LiN(SiMe(2)Ph)(2) in hexane solution results in the isolation of colorless crystals of [PhGa[N(SiMe(2)Ph)(2)](mu-Cl)](2) (2). In contrast, treatment of GaCl(3) with 1 equiv of N(SiMe(3))(3) in CH(2)Cl(2) solutions affords colorless crystals of [MeGaCl(2)](2) (4). Compounds 2 and 4 are the result of monochloride substitution and transfer of a phenyl and methyl ligand, respectively, from the silyl group of the amine to the Ga center. All the complexes have been characterized by X-ray crystallography.
The reaction between [Me2AlCl] and 1 equiv
of HN(SiMe2H)2 in CH2Cl2 afforded colorless crystals of
[Cl(Me)Al{-NH(SiMe2H)}]2 (1). The structure of compound 1 has been determined and shows that the
bridging NH(SiMe2H) groups adopt a mutually trans
arrangement. The related reaction between [Me2AlCl]
and 1 equiv of HN(SiMe2Ph)2 in CH2Cl2 solution resulted in the isolation of colorless crystals. An X-ray
crystallographic study showed that the crystals consist
of a mixture of [Cl(Me)2Al{NH(SiMe2Ph)2}] (2) and
[Cl2(Me)Al{NH(SiMe2Ph)2}] (3) in a 1:4 ratio. The
formation of compound 3 involves the exchange of one
of the methyl groups attached to the aluminum atom
with a chlorine atom.
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