Thermolysis of Me3Al with HN(CH2Ph)2 in toluene solution at 150 °C yields the orthometalated dimer [MeAlN(CH2Ph)-μ-(CH2C6H4)]2 (1) via the stepwise elimination of CH4. The molecular structure of 1 and that of the related aminoalane dimer [Me2AlN(CH2Ph)2]2 (2) were determined by single-crystal X-ray diffraction techniques. Complete 1H and 13C NMR chemical shift assignments for 1 were facilitated by the comparison of 1H NMR 2-D NOESY and X-ray distance data.

Ph) 2 yield ortho-metalated aminoalane dimers as products. These dimers were characterized by elemental analysis, 13 C and 1 H NMR, FT-IR, and single-crystal X-ray determination. The results obtained are discussed in terms of the influence of R on the ease of ortho metalation, structural parameters of the Al 2 N 2 ring, and the nature of the alkyl chain conformations in solution and the solid state.

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