Synthesis of (Pentamethylcyclopentadienyl)tantalum Sulfido Complexes via C−S Bond Cleavage of Triphenylmethanethiolate and Formation of a Novel Trithioborato Ligand

Abstract

Treatment of Cp*TaCl4 with triphenylmethanethiol via C−S bond cleavage gave rise to Cp*TaCl(S)(SCPh3) (1), which was treated with LiSR, Li2S, and NaBH4 to afford Cp*TaS(SR)(SCPh3) (R = CPh3 (2), CMe3 (3)), [Cp*Ta(S)3Li2(THF)2]2 (4), and Cp*3Ta3(S)3(S3BH) (5), respectively. The crystal structures of 1 and 5 were determined by X-ray diffraction