Rhodium(I) complexes containing 9,10-phenanthrenequinone-N-substituted thiosemicarbazone ligands: Synthesis, structure, DFT study and catalytic diastereoselective nitroaldol reaction studies
作者:P. Anitha、R. Manikandan、P. Vijayan、S. Anbuselvi、P. Viswanathamurthi
DOI:10.1016/j.jorganchem.2015.06.004
日期:2015.8
New rhodium(I) complexes [Rh(CO)(L)] (1–3) were prepared by the reaction of [RhCl(CO)(PPh3)2] with 9,10-phenanthrenequinone-N-substituted thiosemicarbazones (HL1-3) and characterized by elemental and spectral analyses (IR, UV–Vis, 1H and 13C NMR, ESI-Mass). The structure of the complex, [Rh(CO)(L1)] (1) has been established by single-crystal X-ray diffraction analysis. The structure has also been optimized
新铑(I)配合物的[Rh(CO)(L)](1 - 3)通过[的RhCl(CO)(PPH反应制备3)2 ]与9,10-菲醌-N-取代缩氨基硫脲(HL 1-3),并通过元素和光谱分析(IR,UV-Vis,1 H和13 C NMR,ESI-Mass)进行表征。配合物的结构[Rh(CO)(L 1)](1)是通过单晶X射线衍射分析确定的。还使用LANL2DZ基集通过DFT方法对结构进行了优化。在室温下,在离子液体存在下,合成的络合物用作苯甲醛与硝基乙烷的非对映选择性硝基羟醛反应的催化剂。发现优化的催化剂2在各种芳族醛和硝基烷之间的不对称亨利反应中是有效的。在多达五次催化运行中检查了催化剂的可重复使用性。结果表明收率略有损失,产物保留了非对映选择性。相信该方法为容易地合成大量非对映异构富集的β-硝基醇提供了机会。