Dialkylamino Phosphorus Metal Carbonyls. 3. Heterobimetallic Mu-Phosphido Derivatives from Reactions of (Diisopropylamino)halophosphine Metal Carbonyl Complexes with Sodium Cyclopentadienyldicarbonylferrate

摘要

The (diisopropylamino)halophosphine metal carbonyl complexes i-Pr2NP(H)XM(CO)5 (X = C1, Br; M = Cr. Mo. W) and i Pr2NP(h)C1Mn(CO)2Cp are readily by selective cleavage of one of the phosphorus nitrogen bonds in the corresponding hydrogen halide, HX. The phosphorus halogen bonds in these (diisopropylamino)halophosphine metal carbonyl complexes are potentially reactive toward nucleophiles including transition-metal nucleophiles that provide possible routes to bimetallic derivatives. This paper describes reactions of the above i-Pr2NP(H)X metal carbonyl complexes with the highly nucleophilic metal carbonyl anion C5H5Fe(CO)2 to give novel heterobimetallic complexes that may be regarded as metal carbonyl derivatives of the trivalent phosphorus ligand CpFe(CO)2P(H)(N-i-Pr2) in which the phosphorus atom is bonded to hydrogen, nitrogen, and iron. Such complexes do not have direct metal-metal bonds but undergo facile photochemical loss of one carbonyl group to give metal metal-bonded micro-phosphido derivatives according to the general scheme (X=H,Y=N-i-Pr2).