作者:Bruno Therrien、Georg Süss-Fink
DOI:10.1016/s0020-1693(03)00425-0
日期:2004.1
4-Trimethyl-cyclohexadiene reacts with RuCl 3 · n H 2 O in refluxing ethanol to afford quantitatively [RuCl 2 (1,2,4-C 6 H 3 Me 3 )] 2 ( 1 ), the coordination of 1,2,4-trimethylbenzene to the ruthenium atom introducing planar chirality at the η 6 -arene ligand. The dinuclear complex 1 reacts with two equivalents of triphenylphosphine (PPh 3 ) to give quantitatively, as a racemic mixture of enantiomers, [RuCl
摘要1,2,4-三甲基环己二烯与RuCl 3·n H 2 O在回流的乙醇中反应,定量得到[RuCl 2(1,2,4-C 6 H 3 Me 3)] 2(1) 1,2,4-三甲苯对钌原子的引入导致在η6-芳烃配体上的平面手性。双核络合物1与两当量的三苯膦(PPh 3)反应,以对映异构体的外消旋混合物形式定量得到[RuCl 2(1,2,4-C 6 H 3 Me 3)(PPh 3)](2) ,其结构已通过(rac)-2的单晶X射线结构分析确定。类似地,1与两个当量的对映体纯膦(1 S,2 S,5 R)-(+)-新薄荷基二苯基膦(nmdpp)反应,可提供良好的收率[RuCl 2(1,2,4-C 6 H 3 Me 3)(nmdpp)](3)作为非对映异构体的混合物,通过结晶从中分离出异构体3a。3a的单晶X射线结构分析允许确定平面手性η6-芳烃部分的绝对构型。最后,配合物1与一当量的二膦配体1,1'-