ORGANOMETALLIC NITROSYL CHEMISTRY .45. IMPROVED SYNTHESES OF CYCLOPENTADIENYL DICHLORO NITROSYL COMPLEXES OF MOLYBDENUM AND TUNGSTEN - UTILITY OF PHOSPHORUS-PENTACHLORIDE AS A CHLORINATING AGENT

Treatment of Cp'M(NO)(CO)2 (Cp' = Cp (eta-5-C5H5) or Cp* (eta-5-C5Me5); M = Mo or W) with an equimolar amount of PCl5 in Et2O at 20-degrees-C results in the efficient, high-yield (80-95 %) syntheses of the corresponding [Cp'M(NO)Cl2]2 complexes. The product complexes have been fully characterized by conventional analytical and spectroscopic methods, including a single-crystal X-ray crystallographic analysis of [Cp*Mo(NO)Cl2]2, which reveals a dimeric molecular configuration, the piano-stool monomers being linked through bridging chlorine atoms.