NOVEL ACETYLENE COMPLEXES OF TITANOCENE AND PERMETHYLTITANOCENE WITHOUT ADDITIONAL LIGANDS - SYNTHESIS, SPECRAL CHARACTERISTICS - AND X-RAY-DIFFRACTION STUDY

New acetylene complexes of titanocene and permethyltitanocene CpTi(R1C2R2) and Cp2*Ti(R1C2R2) (R1 = R2 = SiMe3; R1 = Ph, R2 = SiMe3) without additional ligands have been prepared by the reaction of Cp2TiCl2 and Cp2*TiCl2 with equimolar amounts of Mg and the appropriate acetylene R1C2R2 in THF. The complexes have been isolated from the reaction mixture in an analytically pure state and characterized by spectral methods. The structures of complexes Cp2Ti(PhC2SiMe3), Cp2*Ti(PhC2SiMe3) and Cp2*Ti(Me3SiC2SiMe3) have been proved by an X-ray diffraction study. Some chemical properties of the synthesized complexes have been investigated.