苯磺酸锰配合物的制备及其催化Mannich反应性能研究

Study on preparation of manganese benzenesulfonate complex and its catalytic performance in Mannich reaction

以氯化锰与苯磺酸钠为原料,通过加热合成了苯磺酸锰,进一步将溶剂挥发,得到了苯磺酸锰配合物.通过单晶X-射线衍射技术测定了晶体结构,分子式为:[Mn(H_(2)O)_(6)](C_(6)H_(5)SO_(3))2.粉末X-射线衍射证明目标产物具有较高的相纯度.红外光谱法验证了目标产物的分子结构.热重分析方法表明目标产物的热稳定性较好,在510℃前未分解.实验使用Mannich反应作为探针,考察了苯磺酸锰配合物的催化性能,结果表明,该配合物在催化Mannich反应时,用量少,效率高,重复使用三次仍保持催化活性,苯磺酸锰配合物催化性能良好.

Manganese benzenesulfonate complex was synthesized under the condition of heating with manganese chloride and sodium benzenesulfonate as raw materials.The crystal of the complex was obtained by volatilizing solvent.The crystal structure was determined by single crystal X-ray diffraction technique and the molecular formula was[Mn(H_(2)O)_(6)](C_(6)H_(5)SO_(3))2.Powder X-ray diffraction proved that the target product had high phase purity.The molecular structure of the target product was verified by infrared spectroscopy.Thermogravimetric analysis showed that the target product had good thermal stability and did not decompose before 510℃.The catalytic performance of manganese benzenesulfonate complex was investigated using Mannich reaction as a probe.The results showed that manganese benzenesulfonate could catalyze Mannich reaction with low dosage and high efficiency,and could still maintain catalytic activity after three repeated uses.Manganese benzenesulfonate complex showed good catalytic performance.