两种5-氯水杨酸铬(Ⅲ)配合物的合成及反应性研究

摘要

合成了两种5-氯水杨酸铬(Ⅲ)配合物[Cr(Ⅲ)(5-Cl-SA)(en)2]Cl·2CH3OH·2H2O(Ⅰ)和[Cr(Ⅲ)(5-Cl-SA)(TETA)]-ClO4·H2O(Ⅱ)(5-Cl-SA=5-氯-水杨酸,en=乙二胺,TETA=三乙烯四胺),利用X射线晶体衍射和元素分析进行了结构表征.通过光谱手段比较了两种配合物在不同条件下的反应性.结果表明,在37℃,pH 2.2时,配合物Ⅰ的分解速率比配合物Ⅱ慢;而对于光照射条件下的光化学反应、H2O2存在下的氧化反应、EDTA为配体的取代反应,配合物Ⅰ的分解速率比配合物Ⅱ快.%Two new chromium(Ⅲ) complexs [Cr(Ⅲ)(5-Cl-SA)(en)2]Cl·2CH3OH·2H2O (Ⅰ) and [Cr(Ⅲ)(5-Cl-SA)(TETA)]ClO4·H2O (Ⅱ) (5-Cl-SA = 5-Cl-salicylic acid, en = ethylenediamine, TETA = triethylenetetramine) were synthesized and characterized by elemental analysis and X-ray crystallography.The reactivities of those two complexes were compared under different conditions by using UV-Vis and fluorescence spectroscopy. The results indicated that under acid condition, complex Ⅱ decomposition speed is quicker than complex I; while for the photochemistry reaction, redox reaction in the condition of H2O2 and kinetic activity in the presence of EDTA, the decomposition rate of complex Ⅱ is slower than complex I.