Solution dynamics and molecular structure elucidation of novel aluminium derivatives containing diaminodimethylsilane ligands

The interaction of dimethyldiaminosilane ligands of general formula SiMe2(NR2)(NR’2) (NR2, NR’2 = NiHPr, NHtBu, NC4H8, NHCH2CH2NMe2) with AlX3 (X = Cl, Me) has been investigated and the synthesis of novel aluminium derivatives is reported, namely AlMe3[SiMe2(NR2)(NR’2)], AlX2[SiMe2(NR)(NR’2)] and AlMe[SiMe2(NR)2], containing the silane ligand as neutral, monoanionic and dianionic species, respectively. Moreover, the solution molecular structure and dynamics have been elucidated via 1D/2D variable temperature NMR spectroscopy showing the influence of the N–substituents of the silane ligand and of the aluminium ancillary ligands.