Optoelectronic Properties and Structural Effects of the Incremental Addition of Pyridyl Moieties on a Rhodium Dimer
作者:Daniel Chartrand、Garry S. Hanan
DOI:10.1021/jp502243c
日期:2014.11.13
of five C–C coupling products obtained from the reaction of a paddlewheel tetrakis 4-bromo-N,N′-diphenylbenzamidinate dirhodium dimer with 4-pyridineboronic acid pinacol ester are reported. The coupling reactions occur on one to four amidinate ligands, leading to rhodium dimers containing [tetrakis, tris, cis-bis, trans-bis, or mono]-N,N′-diphenyl-4-(pyridin-4-yl)benzamidinate ligands, effectively
据报导,由桨式四[4-溴-N,N'-二苯基苯甲酰胺基]二吡啶二聚体与4-吡啶硼酸频哪醇酯反应得到的五个CC偶联产物的合成与表征。偶联反应发生在1-4个a基配体上,从而导致含有[tetrakis,tris,cis -bis,trans -bis或mono] -N,N的铑二聚体'-二苯基-4-(吡啶-4-基)苯甲酰胺基配体,有效地在金属络合物上产生新的结合位点。通过柱色谱分离新化合物,并通过X射线晶体学验证确切的构象。氧化还原过程在偶联产物中仅表现出很小的变化,包括两次氧化(相对于SCE的1.30±0.02 V,0.27±0.01 V)和一次还原(相对于SCE的-1.55±0.02 V),均集中在Rh-Rh磁芯上。使用时变密度泛函理论(TD-DFT)与其他四个完全表征的N,N在文献中发现了'-二苯基-芳基-酰胺基铑二聚体。将这九个铑二聚体的两个主要吸收带与TD-DFT计算进行了比较,两者均具有