Modeling the Geometric, Electronic, and Redox Properties of Iron(III)-Containing Amphiphiles with Asymmetric [NN′O] Headgroups
作者:Rajendra Shakya、Marco M. Allard、Mara Johann、Mary Jane Heeg、Eva Rentschler、Jason M. Shearer、Bruce McGarvey、Cláudio N. Verani
DOI:10.1021/ic2009368
日期:2011.9.5
solvent used for synthesis and (ii) the type of the substituent in the phenol moiety. In methanol, the tert-butyl-, methoxy-, and chloro-substituted 3, 4, and 5 are monometallic species, whereas the bromo- and iodo-substituted 6 and 7 form bimetallic complexes taking advantage of stabilizing methoxo bridges generated by solvent deprotonation. In dichloromethane, the bromo- and iodo-substituted 8 and 9
合成了两个含铁(III)的两亲物1和2,它们具有[NN'O]配体HL t Bu-ODA(2-((十八烷基(吡啶-2-基甲基)氨基)甲基)-4,6-di -叔丁基苯酚)和HL I-ODA(2-((十八烷基(吡啶-2-基甲基)氨基)甲基)-4,6-二碘苯酚)。化合物1是单金属的,而EXAFS数据表明,2是单-和双金属物种的混合物。原型[Fe III(L NN'O)2 ] +配合物3 – 9为了理解两亲分子的几何,电子和氧化还原特性,已对其进行了分离和表征。优选单金属或双金属核取决于(i)用于合成的溶剂的性质和(ii)酚部分中取代基的类型。在甲醇中,将叔丁基- ,甲氧基- ,和氯取代的3,4,和5是单金属物种,而溴和碘取代的6和7形式双金属络合物服用稳定由溶剂脱质子化生成methoxo桥的优点。在二氯甲烷中,溴和碘取代的8和9是单金属物种;然而,与叔丁基和甲氧基取代的化合物所观察到的面部配位相反