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[Mo6O17(NAr)2]2-的光谱与[Mo6O19]2-类芳香性的研究
Spectroscopic studies of [Mo6O17(NAr)2]2- and evidence for quasi-aromaticity in [Mo6O19]2-
【摘要】 研究了六钼酸盐的2,6-二甲基苯胺的邻、对位二取代衍生物的UV/Vis1、H-NMR和UV-Vis-NIR反射光谱,发现六钼酸盐的对位二取代衍生物中存在更大的π共轭离域体系。结合量子化学π共轭离域体系的计算结果,成功地解释了二者的光谱特征的差别,从实验的角度证实这类前过渡金属的同多酸阴离子[M6O19]n-(M=Mo和W,n=2;M=V和Nb,n=8)中存在类芳香性。
【Abstract】 It has been concluded that there is a larger conjugated system in trans-bifunctionalized organoimido derivatives of hexamolybdate than in cis-bifunctionalized derivatives by comparison of their UV/Vis,()1H-NMR and UV-Vis-NIR spectra.Quantum mechanical calculations on the π conjugated systems can be used to explain the differences in the spectra of the isomers.The results confirm the presence of quasi-aromaticity in [Mo6O19]2- and similar cluster anions [M6O19]n-(M=Mo,W,n=2;M=V,Nb,n=8).
【关键词】 六钼酸盐;
二取代衍生物;
类芳香性;
光谱;
【Key words】 hexamolybdate; bifunctionalized derivatives; quasi-aromaticity; spectra;
【Key words】 hexamolybdate; bifunctionalized derivatives; quasi-aromaticity; spectra;
【基金】 国家自然科学基金(20201001)
- 【文献出处】 北京化工大学学报(自然科学版) ,Journal of Beijing University of Chemical Technology(Natural Science Edition) , 编辑部邮箱 ,2006年03期
- 【分类号】O621.25
- 【下载频次】121