Pentafluorophenylhydrido-complexes of molybdenum and tungsten and related derivatives

Abstract

The preparation and characterisation of the hydrido-complexes (π-C₅H₄C₆F₅)(π-C₅H₅)MX(C₆F₅)(M = Mo or W, and X = H) are described. They react with carbon tetrachloride forming the chloro-analogues (X = Cl). Oxidation of the chloro-complexes forms the corresponding d¹ cations which may be isolated as the salts [(π-C₅H₄C₆F₅)-(π-C₅H₅)MCl(C₆F₅)]⁺PR₆^–. Structures for the complexes are proposed on the basis of i.r., and ¹H and ¹⁹F n.m.r., electron spin resonance and mass spectra.