Mono(cyclopentadienyl)titanium complexes containing a sulfide-bridged bis(phenolato) ligand. Molecular structure of Ti{2,2′-S(OC 6H 2-4-Me-6- tBu) 2}(η 5-C 5H 5)Cl

Abstract

A series of titanium complexes containing a sulfur-bridged chelating bis(phenolato) ligand, Ti{2,2′-S(OC 6H 2-4-Me-6- t Bu) 2}(η 5-C 5R 5)Cl (R=H, Me; R 5=1,3-(SiMe 3) 2H 3), were prepared by the reaction of the dilithium derivative Li 2[2,2′-S(OC 6H 2-4-Me-6- t Bu) 2] with Ti(η 5-C 5R 5)Cl 3. Alkylation of the chloro complexes gave complexes of the type Ti{2,2′-S(OC 6H 2-4-Me-6- t Bu) 2}(η 5-C 5R 5)R′ (R′=Me, CH 2Ph). The crystal structure of the chloro complex Ti{2,2′-S(OC 6H 2-4-Me-6- t Bu) 2}(η 5-C 5H 5)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) Å was observed.