By the electrocatalytic reactions of [Fe2(CO)6(μ-pdt)] (1) (pdt = SCH2CH2CH2S) with bidentate phosphine complexes dppx (dppm = PPh2CH2PPh2, dppe = PPh2(CH2)2PPh2, dppt = PPh2(CH2)4PPh2), three mono-substituted diphosphine complexes [Fe2(CO)5(μ-pdt)(k1-dppm)] (2), ([Fe2(CO)5(μ-pdt)(k1-dppe)] (3) and [Fe2(CO)5(μ-pdt) (k1-dppt)] (4) were synthesized by keeping the controlling potential at -1.75 V. Di-substituted phosphine complexes [Fe2(CO)4(μ-pdt)(k2-dppe)] (5), [Fe2(CO)4(μ-pdt)(μ-dppm)] (6), [Fe2(CO)4(μ-pdt)(μ-dppm)] (7), [Fe2(CO)4(μ-pdt) (μ-dppt)] (8) were synthesized by holding the potential at -1.85 V. The mono-substituted diphosphine complexes 3 and 4 were characterized by elemental, NMR and IR analysis. We also discuss the catalytic mechanisms of the synthetic process.
通过[Fe2(CO)6(μ-pdt)] (1)(pdt = S S)与二齿膦配合物dppx(dppm = PPh2 PPh2,dppe = PPh2(
CH2)2PPh2,dppt = PPh2( )4PPh2)进行电催化反应,合成了三个单取代
双膦配合物[Fe2(CO)5(μ-pdt)(k1-dppm)] (2)、[Fe2(CO)5(μ-pdt)(k1-dppe)] (3) 和[Fe2(CO)5(μ-pdt)(k1-dppt)] (4),控制电位保持在-1.75 V。在保持电位为-1.85 V的情况下,合成了二取代膦配合物[Fe2(CO)4(μ-pdt)(k2-dppe)] (5)、[Fe2(CO)4(μ-pdt)(μ-dppm)] (6)、[Fe2(CO)4(μ-pdt)(μ-dppm)] (7)和[Fe2(CO)4(μ-pdt)(μ-dppt)] (8)。对单取代
双膦配合物3和4进行了元素分析、NMR和IR分析表征。我们还讨论了合成过程的催化机制。