Standard Molar Enthalpy of Formation of the Solid State Coordination Compound Cu(Nic)(2)center dot H2O(s) (Nic = nicotinic acid)
Standard Molar Enthalpy of Formation of the Solid State Coordination Compound Cu(Nic)(2)center dot H2O(s) (Nic = nicotinic acid)
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固态配位化合物 Cu(Nic)(2) 中心点 H2O(s) 的标准摩尔形成焓（Nic = 烟酸）
DOI：
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发表时间：
2009-03
影响因子：
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通讯作者：
Tan, Z. -C.
中科院分区：
文献类型：
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作者：
Yang, W. -W.;Wang, Q. -C.;Kong, Y. X.;Di, Y. -Y.;Tan, Z. -C.
采用室温固相合成法合成了一水合烟酸铜。采用红外光谱、化学分析、元素分析和X射线粉末衍射技术对配合物的结构和组成进行了表征。{Cu（Ac）（2）中心点H2O（S）}和{HAc（1）}在0.1M HCl溶液中的溶解焓，{Nic（s）}在含有一定量一水合醋酸铜的0.1M HCl溶液中的溶解焓，和{Cu（Nic）（2）中心点H2O（s）}在含有一定量乙酸的0.1M HCl溶液中，在T = 298.15 K通过isoperibol溶液反应量热计测定：Δ H-s（Cu（Ac）2中心点H2O）度= -（6.234 +/- 0.187）kJ.mol（-1），Δ H-s（HAc）度= -（1.788 +/- 0.008）kJ·mol（-1），Δ H-s（Nic）度=（10.337 +/- 0.393）kJ·mol（-1）= -（6.801 +/- 0.130）kJ·mol（-1）。根据Hess定律设计了合理的热化学循环，确定了一水合醋酸铜与烟酸固相反应的焓变为Δ H-r（m）度=（24.817 ± 0.818）kJ·mol（-1），标准摩尔生成焓为-（891.463 ± 2.139）kJ·mol（-1）。
novel compound - monohydrated cupric nicotinate was synthesized by solid phase synthesis at room temperature. FTIR, chemical and elemental analyses, and X-ray powder diffraction technique were applied to characterize the structure and composition of the complex. Enthalpies of dissolution of {Cu(Ac)(2)center dot H2O(S)} and {HAc(1)} in 0.1 M HCl solution, {Nic(s)} in 0.1 M HCl solution containing certain amounts of monohydrated cupric acetate, and {Cu(Nic)(2)center dot H2O(s)} in 0.1 M HCl solution containing certain amounts of acetic acid at T = 298.15 K were determined by means of an isoperibol solution-reaction calorimeter: Delta H-s(Cu(Ac)2 center dot H2O)degrees = -(6.234 +/- 0.187) kJ.mol(-1), Delta H-s(HAc)degrees = -(1.788 +/- 0.008) kJ.mol(-1), Delta H-s(Nic)degrees= (10.337 +/- 0.393) kJ.mol(-1) = -(6.801 +/- 0.130) kJ.mol(-1). In accordance with Hess law, a reasonable thermochemical cycle was designed, the enthalpy change of the solid phase reaction of monohydrated cupric acetate with nicotinic acid was determined to be Delta H-r(m)degrees = (24.817 +/- 0.818) kJ.mol(-1), and the standard molar enthalpy of formation of the title complex was found to be -(891.463 +/- 2.139) kJ.mol(-1).