红外光谱对碱土金属二元羧酸盐结构的研究

IR Spectra of Dicarboxylate of Alkali-earth Metal

研究了三十种二元羧酸金属盐的红外光谱 ,讨论了金属离子和二元酸的种类对二元酸盐配位结构的影响 ,发现Mg盐、Ba盐、Sr盐为螯合配位 ,Ca盐、Zn盐中同时存在螯合配位和桥式配位。二元酸的种类对羧酸盐配位结构没有影响。对羧酸盐在常温和熔融后的配位方式和结构上的差异的研究结果表明 ,Mg盐、Ca盐与Sr盐。

The IR spectra of thirty dicarboxylates of alkali-earth metal have been investigated. It was found that carboxylates of different matal ion have different coordinate structure. Chelate structure prevails in carboxylates of Mg, Sr and Ba. Both chelate structure and bridge structure appear in carboxylates of Ca and Zn. The kind of acid was found to have no effect on the coordinate structure of carboxylate. Through melting the sebacates different kiands of coordinate structure changes can be observed. The Mg salt changes from chelate to bridge and Ca salt becomes inter-molecular chelate form insteat of in-molecular bridre, the structure of Se and Ba salt keep same as before.