2,3-二羟基萘钼多酸有机衍生物的合成及1H NMR和IR谱学研究

本文对二种新合成的2，3－二羟基萘二钼和四钼多酸有机衍生物n-Bu)4N]2Mo2O5(OC10H6O)2](Ⅰ）和n-Bu)4N]2Mo4O10(OC10H6O)2(OCH3)2](Ⅱ)进行了红外光谱与核磁共振波谱研究，发现Mo2O5]^2 中钼氧多桥键的红外振动频率较Mo4O10(OCH3)2]^2 中钼氧多桥键的红外振动频率红移，而在配合物Ⅱ中2，3－二羟基中芳环的^1H化学位移较配合物Ⅰ中向低场移动。同时还发现含二钼配位中心Mo2O5]^2 的Mo2O5(OC10H6O)2]^2-与含四钼配位中心Mo4O10(OCH3)2]^2 的Mo4O10(OC10H6O)2(OCH3)2]^2-生成条件的差异仅仅只在反应体系的pH值的微小变化，说明钼多酸有机衍生物阴离子是对体系酸碱度极为敏感的物质。

The Synthesis,1H NMR and IR Study of[(n-Bu)4N]2[Mo2O5(OC10H6O)2] and [(n-Bu)4N]2[Mo4O10(OC10H6O)2(OCH3)2]

The title organo-molybdate derivatives are synthesized and their IR, 1H NMR spectra have been determined and the relations between the structures and the 1H NMR and IR parameters have been studied. The results indicate that the red shift of the IR frequency of Mo-O-Mo in (n-Bu)4N]2Mo2O5(OC10H6O)2] (complex I) takes place to compare with that in (n-Bu)4N]2Mo4O10 (OC10H6O)2(OCH3)2] (complex II) and lower filed shift of 1H NMR of the aromatic H atoms in complex II occurs as contrasted to that in the complex I. It is found also the organo-molybdate derivatives are very sensitive to the acidity of the chemical system.