Cyclopentadienyl metal teflate (OTeF5) complexes

Abstract

The [M(cp)₂(OTeF₅)₂](M = Ti, Zr, Hf, Mo or W; cp =η⁵-C₅H₅) complexes have been readily prepared in halide–teflate metathesis reactions of [M(cp)₂Cl₂] with TeF₅(OH). They extend the fluoride–teflate analogy to a new class of high-oxidation-state transition-metal complex. The compounds, which have been characterised by a combination of IR, mass spectrometry and multinuclear NMR spectroscopy, are shown to have polar metal–teflate interactions.