Acetylenetitanium complex stabilized by aminopyridinato ligands

The first acetylenetitanium complex stabilized by aminopyridinato ligands has been prepared by the reaction of AP(2)TiCl(2) (1) - Ap-H = 2-[(2,6-diisopropylphenyl)amino]pyridine - with equimolar amount of bis (trimethylsilyl) acetylene in the presence of magnesium. The complex was characterized by spectroscopic methods as well as by X-ray single crystal structure analysis. Reduction of 1 with KC8 under N-2 in the absence of any other stabilizing ligand leads to the ligand rearrangement product AP(3)Ti. In the reaction of the acetylenetitanium complex with acetone the titanaoxacyclopentene was formed. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).