Mono(cyclopentadienyl)titanium complexes containing a sulfide-bridged bis(phenolato) ligand.: Molecular structure of Ti{2,2′-S(OC6H2-4-Me-6-tBu)2}(η5-C5-H5)Cl

A series of titanium complexes containing a sulfur-bridged chelating bis(phenolato) ligand, Ti{2,2 ' -S(OC6H3-4-Me-6-' Bu)(2)}(eta (5)-C5R5)Cl (R = H, Me; R-5 = 1,3-(SiMe3)(2)H-3), were prepared by the reaction of the dilithium derivative Li-2[2,2 ' -S(OC6H2-4-Me-6 ' Bu)(2)]- with Ti(eta (5)-C5R5)Cl-3. Alkylation of the chloro complexes gave complexes of the type Ti(2,2 ' -S(OC6H2-4-Me-6-' Bu)(2)} (eta (5)-C5R5)R ' (R ' = Me, CH,Ph). The crystal structure of the chloro complex Ti(2,2'-S(OC6H2-4-Me-6-' Bu)(2)}(eta (5)-C5H5)Cl has been determined by X-ray diffraction and shows a monomeric four-legged piano-stool structure with the sulfur and chlorine atoms in trans positions. A long titanium-sulfur bond length of 2.907(1) Angstrom was observed. (C) 2001 Elsevier Science B.V. All rights reserved.