ISOCYANIDE COMPLEXES OF TITANIUM - SYNTHESIS AND X-RAY CRYSTAL-STRUCTURE OF BIS(2-TRIMETHYLSILOXYPHENYLISOCYANIDE)TITANIUM(IV)

The reaction of TiCl4 with 2-trimethylsiloxyphenyl isocyanide 1 is des cribed. At -10 degrees C reaction of TiCl4 with 1 in n-hexane yields t he air-sensitive octahedral diisocyanide complex cis-[TiCl4(1)(2)] 2. This complex crystallizes from n-hexane as solvate 2 . C6H14 and was c haracterized by X-ray crystallography. At room temperature TiCl4 react s with 1 in toluene to give an orange air-sensitive compound 3, which was not completely characterized. Elemental analyses indicate the form ation of a complex composed of one molecule of TiCl4 and one molecule of 1. IR spectroscopy shows that no isocyanide ligand is present in 3.