The preparation and characterisation of a series of group IV metallocene dithiolato complexes containing a naphthalene backbone

Reduction of the sulfur-sulfur bond of naphtho[1,8-cd]-1,2-dithiole with 2 equivalents of Li(BEt)(3)H to give the dilithium salt followed by the addition of an equivalent of bis(pentamethyl)metallocene dichloride [(CP)(2)(MCl2)-M-*, M = Ti, Zr, Hf, Cp-* = C5Me5] (TiS2C10H6)-Ti-* (2) and (Cp)2(*)ZrS(2)C(10)H(6) (3) containing six-membered gives the sulfur bonded complexes (Cp)2 6 (1), (Cp)(2)(ZrS2C10H6)-Zr-* MS2C3 rings. The products were obtained in moderate yield as crystals and have been fully characterised and had their X-ray crystal structures determined. (c) 2005 Elsevier Ltd. All rights reserved.