摘要
合成了氨基酸与La3 + 形成的三元混配体配合物 ,通过红外光谱分析、热重分析和化学分析 ,确定了配合物的组成 ;用溶解量热法测定了配合物和反应物分别在 2mol·L-1HCl中的溶解焓 ,根据热化学循环得出配合反应焓 :△rHΘm =- 4 99 6 2kJmol-1,根据实验结果和文献数据计算出混配合物的标准摩尔生成焓为△fHθm[La(Glu) (Arg)Cl3 ·2H2 O ,s ,2 98 2k]=- 6 5 5 2 15kJmol-1.
A new complexes of amino ac id with La 3+ have been synthesized,and composition of the complexes were det ermined by infrared spectra analysis,chemical analysis,thermogravimetric analysi s;and the molar dissolution enthalpy was determined about the reactans and produ cts of the coordination reaction in 2molL -1 HCl at 298 2k,According to th e thermochemistry cycle,enthalpy of the coordination reaction has been determine d.And the standard formation enthalpy of complexes was caculated:△_fH θ _mLa(Glu)(Arg)Cl_3·2H_2O,s,298 2k]=-655215kJmol-1.
出处
《衡阳师范学院学报》
2002年第3期7-10,共4页
Journal of Hengyang Normal University
