Bio-Inspired Transition Metal-Organic Hydride Conjugates for Catalysis of Transfer Hydrogenation: Experiment and Theory
作者:Alex McSkimming、Bun Chan、Mohan M. Bhadbhade、Graham E. Ball、Stephen B. Colbran
DOI:10.1002/chem.201405129
日期:2015.2.9
of the type [Cp*M(LBI)Cl][PF6]2 (M=Rh, Ir) have been made and fully characterised by cyclic voltammetry, UV/Vis spectroelectrochemistry, and, for the IrIII congener, X‐ray crystallography. [Cp*Rh(LBI)Cl][PF6]2 catalyses the transfer hydrogenation of imines by formate ion in very goods yield under conditions where the corresponding [Cp*Ir(LBI)Cl][PF6] and [Cp*M(phen)Cl][PF6] (M=Rh, Ir) complexes are
受到酵母醇脱氢酶(yADH)的启发,苯并咪唑(BI +)有机氢化物受体结构域与1,10-菲咯啉(phen)金属结合结构域结合,从而提供了一种新型的多功能配体(L BI +)氢化载波容量(大号BI + + H - ⇌大号BI H)。已经制备了[Cp * M(L BI)Cl] [PF 6 ] 2类型的配合物(M = Rh,Ir),并通过循环伏安法,UV / Vis光谱电化学和对于Ir III同源物X进行了全面表征。射线晶体学。[Cp * Rh(L BI] Cl] [PF 6 ] 2在相应的[Cp * Ir(L BI)Cl] [PF 6 ]和[Cp * M(phen)Cl]的条件下,通过甲酸酯以极高的收率催化亚胺的转移氢化。[PF 6 ](M = Rh,Ir)络合物作为催化剂几乎是惰性的。讨论了催化途径的可能替代方法,并通过DFT计算确定了中间体和过渡态的自由能。DFT研究支持了一种机制,该机制涉及甲酸驱动的RhH形成(90