Synthesis and characterization of Cp2Ti-containing organometallics via in situ oxidative-addition 'Cp2Ti' intermediate.: Crystal structures of (1-C10H7S)2TiCp2, [(η5-C5H5)Fe(η5-C5H4CH2S)]2 TiCP2 and [η2-OC(Ph)=C(Ph)O]TiCp2

A simple and convenient route for synthesizing CP2Ti-containing compounds (RS)(2)TiCP2 (1, R = l-C10H7; 2, R = CH2-CHCH2; 3, R=n-C5H11; 4. R=CH2CO2Me; 5, R=CH2CO2Et; 6, R=(eta(5)-C5H5)Fe(eta(5)-C5H4CH2)) and [eta(2)-OC(Ph)=C(h)O]ToCp(2) (7) has been developed. This route starts from Cp2TiCl2 and involves an in situ oxidative-addition of the intermediate 'titanocene' with corresponding RSSR and benzil. While 7 was previously prepared by another route, 1-6 and one starting material [(eta(5)-C5H5)Fe(eta(5)-C5H4CH2)](2)S-2 (8) are new and have been characterized by elemental analysis, IR and H-1-NMR spectroscopy, as well as by X-ray diffraction analysis for 1, 6 and 7. Furthermore, the electrochemical properties of 1-6 have been studied by cyclic voltammetry. (C) 2002 Elsevier Science B.V. All rights reserved.