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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Phosphido Complexes. XIII. P-functional Phosphido-Bridged Heterobimetallic Complexes with and without a Metal-Metal Bond; P(SiMe3)2-Bridged cp(CO)xFe Derivativescp(CO)2FeP(SiMe3)2 1 reacts with the carbonyl nitrosyl complexes Co(CO)3(NO), Fe(CO)2(NO)2,Mn(CO)(NO)3 substituting a CO ligand and with the THF complexes M′(CO)5THF(M′ = Cr, Mo, W), Mncp(CO)2THF MnMecp(CO)2 which can be obtained in solution substituting the THF ligand to give the phosphido-bridged bimetallic complexes cp(CO)2Fe[μ-P(SiMe3)2]M′Lm 2 (M′Lm = Co(CO)2(NO) b, Fe(CO)(NO)2 c, Mn(NO)3 d, Cr(CO)5 f, Mo(CO)5 g, W(CO)5 h, Mncp(CO)2 i, MnMecp(CO)2 j). Solutions of Li(Me3Si)2PM′Lm 4e-l (M′Lm = Fe(CO)4 e, Crcp(CO)(NO) k, Vcp(CO)3 l) are available by a selective cleavage reaction of a Si—P bond in the complexes (Me3Si)3PM′Lm 3e-l using n-BuLi. Reactions of cp(CO)2FeBr with 4e-l give the bimetallic complexes 2e-l. The open-chain complexes 2c, 2f, 2h-k undergo a photochemical decarbonylation reaction to form the phosphido-bridged bimetallic complexes cp(CO)Fe[μ-CO, μ-P(SiMe3)2]M′Lm-1(Fe-M′) 5 (M′Lm-1 = Fe(NO)2 c, Cr(CO)4 f, W(CO)4 h, Mncp(CO) i, MnMecp(CO) j, Crcp(NO) k) containing a metal-metal bond. Equilibria between various isomers can partially be observed in solutions of the complexes 5. I.R., N.M.R., and mass spectral data are reported.
    Notes: cp(CO)2FeP(SiMe3)2 1 reagiert mit den Carbonylnitrosylkomplexen Co(CO)3(NO), Fe(CO)2(NO)2, Mn(CO)(NO)3 unter CO-Substitution und mit den in Lösung erhältlichen THF-Komplexen M′(CO)5 THF (M′ = Cr, Mo, W), Mncp(CO)2 THF, MnMecp(CO)2 THF unter THF-Substitution zu den phosphidoverbrückten Zweikernkomplexen cp(CO)2Fe[μ-P(SiMe3)2]M′Lm2(M′Lm = Co(CO)2(NO) b, Fe(CO)(NO)2 c, Mn(NO)3 d, Cr(CO)5 f, Mo(CO)5 g, W(CO)5 h, Mncp(CO)2 i, MnMecp(CO)2 j). Durch selektive Spaltung einer Si—P-Bindung in den Komplexen (Me3Si)3PM′Lm 3e-l (M′Lm = Fe(CO)4 e, Crcp(CO)(NO) k, Vcp(CO)3 l) mit n-BuLi sind Lösungen von Li(Me3Si)2PM′Lm 4e-l zugänglich. Umsetzungen von cp(CO)2FeBr mit 4e-i ergeben die Zweikernkomplexe 2e-l. Durch photochemische CO-Abspaltung aus den offenkettigen Komplexen 2c, 2f, 2h-K sind die phosphidoverbrückten Zweikernkomplexe mit Metall-Metall-Bindung cp(CO)Fe[μ-CO, μ-P(SiMe3)2]M′Lm-1(Fe-M′) 5 (M′Lm-1 = Fe(NO)2 c, Cr(CO)4 f, W(CO)4 h, Mncp(CO) i, MnMecp (CO) j, Crcp (NO) k) erhältlich. In Lösung beobachtet man bei den Komplexen 5 teilweise Gleichgewichte zwischen verschiedenen Isomeren. NMR- und IR-spektroskopische sowie massenspektrometrische Daten werden mitgeteilt.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
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