均苯四甲酸过渡金属配合物的合成及表征

Synthesis and Characterization of Transitional Metal Complexes of Pyromellitic Acid

用均匀沉淀法合成了均苯四甲酸过渡金属配合物。利用热重、元素分析和红外光谱仪对所制得的4种配合物进行了表征。通过热重和元素分析得到了其配合物的通式。由热重-微商曲线得到,4种无水配合物的热稳定性次序为Zn2(C10H2O8)>Cd2(C10H2O8)>Mn2(C10H2O8)>Cu2(C10H2O8)。红外光谱分析表明,M2(C10H2O8).nH2O中羧酸盐基团除锌盐的配位键可能为桥式配位外,其余均为双齿配位。

Transitional metal complexes of pyromellitic acid were synthesized by homogeneous precipitation method, and characterized by TG, element analysis and FTIR. The results of TG and element analysis show their general formula. TG and DTG curves show that the thermal stability of four anhydrous transitional metal complexes decrease in the order： Zn2 （C10H2O8） ; Cd2（C10H2O8） ; Mnz （C10H2O8） ; Cu2 （C10H2O8）. The IR spectrum of prepared complexes suggests that carboxylate groups in the complexes of M（ Ⅱ ） acted as bidentate chelating with the exception of the complex of Zn（ Ⅱ ） as bidentate bridging.