用2-羰基丙酸水杨酰腙与轻稀土硝酸盐反应,合成了7种新的配合物.经元素分析、化学分析及X射线粉末衍射等手段确定了其组成为RE(C10H9N2O4)(C10H8N2O4)·nH2O(RE=La、Ce、Pr、Nd、Sm、Eu、Gd),用红外、紫外、荧光光谱分析对以上配合物的结构进行了表征;用微热量计测定了稀土芳酰腙配合物的溶解焓,发现其溶解焓数据不随稀土原子序数单调变化,而呈转折变化,可认为呈稀土的四分组现象的前两组. Seven novel complexes were synthesized by the reaction of 2-oxo-propionic acid salicyloyl hydrazone with light rare earth nitrate and its composition was determined to be RE (C10H9N2O4) (C10H8N2O4) · by elemental analysis, chemical analysis and X-ray powder diffraction The structures of the above complexes were characterized by IR, UV and fluorescence spectroscopy. The molar ratio of rare earth aroyl hydrazone to Dissolved enthalpy and found that the data of its enthalpy of dissolution does not change monotonically with the atomic number of rare earth, but showed a transitional change, which can be considered as the first two groups of four-group phenomenon of rare earth.