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

A simple and convenient route for synthesizing Cp2Ti-containing compounds (RS)2TiCp2 (1, R=1-C10H7; 2, R=CH2CHCH2; 3, R=n-C5H11; 4, R=CH2CO2Me; 5, R=CH2CO2Et; 6, R=(η5-C5H5)Fe(η5-C5H4CH2)) and [η2-OC(Ph)C(Ph)O]TiCp2 (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 [(η5-C5H5)Fe(η5-C5H4CH2)]2S2 (8) are new and have been characterized by elemental analysis, IR and 1H-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.