Cyclopentadienyl Tantalum(V) Complexes with Primary and Secondary Ferrocenylphosphine Ligands
作者： René Kalio , Peter Lönnecke , Arnaldo Cinquantini , Piero Zanello , Evamarie Hey-Hawkins
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摘要: The reaction of [Cp*TaCl4] (1a, Cp* = C5Me5) or [Cp′TaCl4(THF)] (1b, Cp′ C5MeH4) with PH2Fc [Fc Fe(η5-C5H5)(η5-C5H4)] and PH2CH2Fc gives the primary ferrocenylphosphine complexes [CpRTaCl4(PH2Fc)] [CpR (2a), (2b)] [CpRTaCl4(PH2CH2Fc)] (3a), (3b)], respectively. 1 reacts (PH2)2fc [fc Fe(η5-C5H4)2] new secondary phosphine PH(CH2Fc)2 to give ferrocenyl-bridged [{(CpRTaCl4)[PH2(η5-C5H4)]}2Fe] (4a), (4b)] [CpRTaCl4{PH(CH2Fc)2}] (5a), (5b)]. Complexes 1b 2–5 were characterised spectroscopically (1H, 13C, 31P NMR, MS, IR) 1b, 2a, 3a, 4a, 5a also by X-ray crystallography. electrochemical behaviour 3a 5b exhibits complicated electron transfer processes, which are due complex redox activity corresponding ligands PH(CH2Fc)2.
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