Ether‐Soluble Ti⁰ and Bis(η⁶‐arene)titanium(0) Complexes from the Reduction of TiCl₄ with Triethylhydroborate

Abstract

The first preparation of bis (η 6 ‐arene)titanium(0) complexes was achieved by reduction of TiCl 4 with the borate [BEt 3 H] − in the appropriate arene solvent. In contrast the same reduction in THF leads to soluble “TiH 2 ”, which loses H 2 when dried to give a substance which can be formulated as Ti · 0.5 THF with various amounts of residual hydrogen. X‐ray photoelectron spectroscopy and EXAFS analysis support the assumed oxidation state of zero for the titanium.