Subtle variation of stereo-electronic effects in rhodium(I) carbonyl Schiff base complexes and their iodomethane oxidative addition kinetics
作者:Pennie P. Mokolokolo、Alice Brink、Andreas Roodt、Marietjie Schutte-Smith
DOI:10.1080/00958972.2020.1809657
日期:2020.10.1
tertiary phosphine ligands follow a surprising similar reactivity relationship as observed for a range of isostructural [RhI(X,O-Bid)(CO)(PR3)] complexes, with X = O, N or S in corresponding oxinate, acetylacetonate and thioureate mono anionic X,O-Bid ligands. This suggests systematic and responsive dynamic behavior of the PR3 ligands, independent of the bidentate chelate at the Rh(I) metal center. A variation
摘要 [RhI(N,O-ScBa)(CO)(PR3)] 形式的铑 (I) 羰基配合物(R = Ph 或 Cy),N,O-ScBaH 是一种单阴离子双齿席夫碱配体,2-报道了 (环戊基亚氨基甲基)-5-甲基苯酚 (5-Me-Sal-CyPH),并在 Rh(I) 上带有不同的膦配体。N,O-ScBaH 也变为 2-(环己基亚氨基甲基)苯酚 (Sal-CyH) 和 2-(异丙基亚氨基甲基)-5-甲基苯酚 (5-Me-Sal-IPropH) 以研究不同取代基对Schiff 的外围基于金属中心反应性。描述了两个样品配合物的结构表征,并介绍了利用紫外/可见光、红外和 31 P NMR 光谱对碘甲烷氧化加成进行的广泛的光谱动力学-机械研究。碘甲烷氧化加成仅导致 RhIII-烷基配合物作为最终产物,而关联激活是从大的负 ΔS ≠ 值推断出来的。[RhI(N,O-ScBa)(CO)(PR3)] 配合物的相对反应性在逐步改变