Preparation and characterization of alkane– and arene–chalcogenolate complexes of η5-cyclopentadienyltitanium(IV): first synthesis of [Ti(η5-C5H5)(SeCH3)3]
Abstract
A simple synthesis of [Ti(cp)Br3](1)(cp =η5-C5H5) from [Ti(cp)Cl3] and BBr3 is described. Reaction of complex (1) with Na(SCH3) or Li(SeR)(R = CH3 or C6H5) afforded the derivatives [Ti(cp)(SCH3)3](2), [Ti(cp)(SeCH3)3](3), or [Ti(cp)(SeC6H5)3](4), respectively. Complexes (2)–(4) were characterized by 1H n.m.r., i.r., and mass spectroscopy; (3), the first example of a cyclopentadienyltris(selenolato)titanium compound, was also studied by 77Se n.m.r. spectroscopy. The oxidation and hydrolysis behaviour of (2) and (3) in solution is discussed on the basis of their 1H n.m.r. spectra.