NMR data of 2-substituted benzoquinoline Ir(III) complexes show that the pendant group G does not necessarily become agostic despite the presence of an available nearby coordination site at the Ir center. Thus for G = t-Bu the agostic structure is observed, but for G = i-Pr, the potentially agostic i-Pr methyl groups point away from the metal. ONIOM(B3PW91/UFF) calculations reproduce the experimental
2-取代的苯并
喹啉Ir(III)配合物的固态结构和NMR数据表明,尽管在Ir中心附近有可用的配位位点,但侧基G不一定变得无规。因此,对于G = t -Bu,观察到了迷雾结构,但是对于G = i -Pr,潜在的迷幻i -Pr甲基指向远离
金属的方向。ONIOM(B3PW91 / UFF)的计算重现了实验观察结果,并表明几种
配体-
配体相互作用(平行的芳族堆积和CH-··H-Ir相互作用)成功地以能量与竞争性竞争。发现
氟苯(PhF)是用于合成t的更好的非配位极性溶剂-Bu配合物比
二氯甲烷复杂。