Übergangsmetallphosphidokomplexe. XIII. P-funktionelle phosphidoverbrückte Heterozweikernkomplexe mit und ohne Metall-Metall-Bindung; P(SiMe3)2-verbrückte cp(CO)xFe-Derivate |
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| Authors: | H Schfer W Leske |
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| Institution: | H. Schäfer,W. Leske |
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| Abstract: | 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 Derivatives cp(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)2Feμ-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)Feμ-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. |
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