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制备了Pr、Yb两种希土元素异硫氰酸(?)与苄胺的固体配合物.并对其进行了组成分析、红外光谱分析、X射线衍射物相分析和热重分析.测量了298.15K时两种固体配合物RE(NCS)_3·4C_6H_5CH_2NH_2在HCl水溶液中的反应热和相应的两种希土元素异硫氰酸盐水合物RE(NCS)_3·n_1H_2O(RE为Pr时,n_1=7;RE为Yb时,n_1=6)在C_6H_5CH_2NH_2-HCl-H_2O溶液中的积分溶解热以及苄胺C_6H_5CH_2NH_2在HCl水溶液中的反应热.藉助本文所设计的热化学循环,求得了这两种配合物的标准生成焓,还计算了它们的晶格能.
The solid complexes of Pr and Yb, two kinds of rare earth element isothiocyanates (?) With benzylamine, were prepared and characterized by elemental analysis, infrared spectroscopy, X-ray diffraction and thermogravimetric analysis The reaction heat of two solid complexes RE (NCS) _3 · 4C_6H_5CH_2NH_2 in HCl aqueous solution at 298.15K and the corresponding two kinds of rare earth elements isothiocyanate hydrate RE (NCS) _3 · n_1H_2O (RE is Pr, n_1 = 7; RE is Yb, n_1 = 6) in C_6H_5CH_2NH_2-HCl-H_2O solution and the reaction heat of benzylamine C_6H_5CH_2NH_2 in HCl aqueous solution.According to the thermochemical cycle designed in this paper, The standard enthalpy of formation of the complexes is also calculated for their lattice energy.