Titanium(IV) complexes bearing the (CpC)- ligand

(CpH)-H-C is a chiral cyclopentadienide-type ligand consisting of a CpH core with two annulated dibenzocycloheptatriene wings. Due to the presence of the seven-membered rings, the wings are bent making (CpH)-H-C a novel, intrinsically chiral CpH derivative. Starting from ClTi((OPr)-Pr-i)(3) and (Cp-C)(-), obtained by deprotonation of (CpH)-H-C with BuLi, the titanium (IV) half-sandwich complex (Cp-C)Ti((OPr)-Pr-i)(3) was obtained. Further treatment of (Cpc)Ti((OPr)-Pr-i)3 with an excess of Me(S)il gave the iodo derivative (Cp-C)Ti((OPr)-Pr-i)I-2 in good yields. Both complexes could structurally be characterized by means of single crystal X-ray crystallography. Direct conversion of (Cp-C)(-) with TiCl4 resulted in oxidation of the anionic ligand and thus formation of the C-C bridged dimer (Cp-C)(2). (C) 2016 Elsevier B.V. All rights reserved.