Synthese und Charakterisierung eines neuen gemischten Titan–Aluminium-Alkoxids

Synthesis and Structural Characterization of a Novel Titanium–Aluminium Alkoxide The novel Ti-Al-Alkoxide TiAl₂(OⁱPr)₁₀, was synthesized from aluminium turnings and titanium tetraisopropoxide in 2-propanol and isolated by subsequent fractionating distillation. Colourless prismatic crystals precipitated after 24 h at 20°C from the main fraction. They proved very moisture sensitive. The compound crystallizes in the monoclinc space group C2/c (no. 15) with a = 2303.1(4), b = 1097.2(3), c = 1685.0(3) pm, β = 104.32(1)° and Z = 4. The molecular structure exhibits a bent Al-Ti-Al′ unit, in which Al shows tetrahedral, but Ti octahedral¹ coordination. The polyhedra are connected via cis-edges of the octahedron. The structure of the compound in solution was determined by NMR spectroscopy (¹H, ¹³C, COSY) and proved to be identical to the structure in the solid state.