Pentafluorophenyl phosphorus and arsenic complexes of iron, ruthenium, and molybdenum
Abstract
Treatment of (C6F5)2ECl (E = P or As) with the anions [π-C5H5Fe(CO)2]– and [π-C5H5Mo(CO)3]– affords the mononuclear complexes (C6F5)2EFe(CO)2π-C5H5 and (C6H5)2EMo(CO)3π-C5H5. The arsenic complexes can also be prepared by reaction of [(C6F5)2As]2 with [π-C5H5Fe(CO)2]2 and [π-C5H5Mo(CO)3]2. Attempts to capture (C6F5)2PLi with π-C5H5Fe(CO)2Cl or π-C5H5Mo(CO)3Cl were unsuccessful. U.v. irradiation of the mononuclear arsenic complexes gave [(C6F5)2AsFe(CO)π-C5H5]n and [(C6F5)2AsMO(CO)2π-C5H5]n. Reaction of [(C6F5)2E]2 with Fe3(CO)12 gave the bridged binuclear complexes [(C6F5)2PFe(CO)3]2 and [(C6F5)2AsFe(CO)3]2. The binuclear phosphorus complex is also obtained on heating (C6F5)2PH with Fe3(CO)12. Triruthenium dodecacarbonyl reacts with [(C6F5)2E]2 to give [(C6F5)2PRu(CO)3]2 or [(C6F5)2AsRu(CO)3]2.
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