The chemistry of π-cyclopentadienyl nitrosyl molybdenum complexes part III. Dichloro- and dibromo-compounds and their Lewis base adducts

Abstract

The stoicheiometric reaction of [(π-C₅H₅)Mo(NO)(CO)₂] with chlorine or bromine affords [(π-C₅H₅)Mo(NO)X₂]₂(X = Cl or Br). Those species react with Lewis bases L (L = PPh₃, AsPh₃, PMe₂Ph, pyridine, or bipyridyl) or halide ion (X = Cl or Br) giving [(π-C₅H₅)Mo(NO)X₂L], [(π-C₅H₅)Mo(NO)Br(PMe₂Ph)₂]Br, [(π-C₅H₅)Mo(NO)Cl(bipy)]Cl and [(π- C₅H₅)Mo(NO)X₃]^–. The spectral properties of these compounds are compared with those of the corresponding iodides. The synthesis of [(π-C₅H₅)Mo(NO)(CN)Br]_n is briefly reported.