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.