Fast O<sub>2</sub> Binding at Dicopper Complexes Containing Schiff-Base Dinucleating Ligands
作者:Anna Company、Laura Gómez、Rubén Mas-Ballesté、Ivan V. Korendovych、Xavi Ribas、Albert Poater、Teodor Parella、Xavier Fontrodona、Jordi Benet-Buchholz、Miquel Solà、Lawrence Que,、Elena V. Rybak-Akimova、Miquel Costas
DOI:10.1021/ic0701108
日期:2007.6.1
J.K-1.mol-1), nearly 3 orders of magnitude faster than in the parent [CuI2(m-XYLMeAN)]2+. Thermal decomposition of 1-3(O2) does not result in aromatic hydroxylation. The mechanism and kinetics of O2 binding to 1X (X=CF3SO3 and BArF) are discussed and compared with those associated with selected examples of reported models of O2-processing copper proteins. A synergistic role of the copper ions in O2
Dicopper(I)络合物的新家族[CuI2RL](X)2(R = H,1X,R = tBu,2X和R = NO2、3X,X = CF3SO3,ClO4,SbF6或BArF,BArF = [B制备并表征了3,5-(CF3)2C6H3} 4]-),其中RL是包含通过二甲苯基间隔基连接的两个三齿结合位点的席夫碱配体,并且已经研究了其与O2的反应。设计复合物的目的是复制3型双铜蛋白活性位点的结构方面。它们包含两个三个三坐标的铜位和一个相当灵活的豆荚配体主链。通过单晶X射线衍射分析已经建立了1ClO4、2CF3SO3、2ClO4和3BArF.CH3CN的固态结构。1ClO4采用固态的聚合物结构,而2CF3SO3、2ClO4和3BArF.CH3CN是单体。已通过1H和19F NMR光谱研究了溶液中的络合物,并提出了动态过程。丙酮中的1-3BArF和1-3CF3SO3与O2迅速反应生成可代谢的[CuIII2(mu-O)2(RL)]