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

Abstract

Reduction of the sulfur–sulfur bond of naphtho[1,8- cd]-1,2-dithiole with 2 equivalents of Li(BEt) 3H to give the dilithium salt followed by the addition of an equivalent of bis(pentamethyl)metallocene dichloride [ ( Cp ) 2 ∗ MCl 2 , M = Ti , Zr , Hf , Cp ∗ = C 5 Me 5 ] gives the sulfur bonded complexes ( Cp ) 2 ∗ TiS 2 C 10 H 6 ( 1 ) , ( Cp ) 2 ∗ ZrS 2 C 10 H 6 ( 2 ) and ( Cp ) 2 ∗ HfS 2 C 10 H 6 ( 3 ) containing six-membered MS 2C 3 rings. The products were obtained in moderate yield as crystals and have been fully characterised and had their X-ray crystal structures determined.