3-甲氧基-4-羟基苯甲醛Schiff碱及其配合物的合成与催化性能

Synthesis and Catalytic Activity of 4 Hydroxy 3 Methoxy Benzaldehyde Schiff Bases and Complexes

由４－氨基－３，５－二取代－１，２，４－三唑与３－甲氧基－４－羟基苯甲醛反应得到两种Ｓｃｈｉｆ碱（１）和（２），将这两种Ｓｃｈｉｆ碱作为配体（Ｌ），分别与金属高氯酸盐Ｃｕ（Ｃ１Ｏ４）２·６Ｈ２Ｏ和Ｃｏ（Ｃ１Ｏ４）２·６Ｈ２Ｏ反应得到四种单核配合物，并通过元素分析、红外光谱、电子光谱、摩尔电导率、室温磁化率等手段对配合物进行了表征。认为该配合物为２∶１型（Ｌ∶Ｍ），金属离子（Ｍ）为四配位，分别与两个配体羟基、甲氧基中的氧配位。首次将这类配体和配合物作为均相催化剂，考察其对ＣＯ２与环氧乙烷合成碳酸乙烯酯的催化性能，并择述了其催化作用的几种可能机理。

Two Schiff bases (1) and (2) have been synthesized from condensed reaction of 4 amino 3,5 disubstituted 1,2,4 triazole and 4 hydroxy 3 methoxy benzaldehyde,and the corresponding mononuclear complexes (3)～(6) have been subsequently prepared,by reacting with Cu(ClO 4) 2·6H 2O,Co(ClO 4) 2·6H 2O and characterized by elemental analyses,IR and electronic spectra,conductivity,and temperature magnetic susceptibility.The results indicate that the complexes are mononuclear complexes (L∶M=2∶1);the coordination of the Schiff bases is through oxygen of hydroxy and methoxy group.For the frist time,these compounds have been studied as catalysts for the reaction of carbon dioxide with oxirane.The reaction mechanism is discussed.