Synthetic Modeling of Nitrite Binding and Activation by Reduced Copper Proteins. Characterization of Copper(I)−Nitrite Complexes That Evolve Nitric Oxide
作者:Jason A. Halfen、Samiran Mahapatra、Elizabeth C. Wilkinson、Alan J. Gengenbach、Victor G. Young、Lawrence Que、William B. Tolman
DOI:10.1021/ja952691i
日期:1996.1.1
excess NaNO2 yielded the novel dicopper(I,I) complexes [(LCu)2(μ-NO2)]PF6. The complex with L = Li-Pr3 was cleaved by PPh3 to afford [Li-Pr3Cu(PPh3)]PF6 and Li-Pr3Cu(NO2), a structural model for the substrate adduct of copper nitrite reductase. Oxidation of the dicopper(I,I) compound (L = Li-Pr3) with (Cp2Fe)(PF6) in CH2Cl2 yielded the deep red, mixed valent, dicopper(I,II) species [(Li-Pr3Cu)2(μ-NO2)](PF6)2
为了为铜蛋白介导的亚硝酸盐还原中假定的中间体提供优先权,一系列包含 CuI−NO2- 单元的新型配合物,包括单铜 (I)、双铜 (I,I) 和混合价双铜 (I ,II) 和铜 (I)-锌 (II) 物质被制备、充分表征并进行反应性研究,旨在探测它们产生一氧化氮的能力。[LCu(CH3CN)]PF6 (L = Li-Pr3, 1,4,7-triisopropyl-1,4,7-triazacyclononane, or LBn3, 1,4,7-tribenzyl-1,4,7) 溶液的处理-triazacyclononane) 在 MeOH 中与过量的 NaNO2 产生新型二铜 (I,I) 配合物 [(LCu)2(μ-NO2)]PF6。L = Li-Pr3 的配合物被 PPh3 裂解,得到 [Li-Pr3Cu(PPh3)]PF6 和 Li-Pr3Cu(NO2),这是亚硝酸铜还原酶底物加合物的结构模型。二铜的氧化(I