Synthesis,Characterization and Standard Molar Formation Enthalpy of [Sm(C_7H_5O_3)_2(C_4H_6NO_2S)]·2H_2O
Synthesis,Characterization and Standard Molar Formation Enthalpy of [Sm(C_7H_5O_3)_2(C_4H_6NO_2S)]·2H_2O作者机构:Department of Chemistry and Life Science Xiangnan University Chenzhou 423000 P. R. China
出 版 物:《Chemical Research in Chinese Universities》 (高等学校化学研究(英文版))
年 卷 期:2009年第25卷第4期
页 面:564-568页
核心收录:
学科分类:081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0835[工学-软件工程] 0703[理学-化学] 070301[理学-无机化学] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术(可授工学、理学学位)]
基 金:Supported by the Hunan Provincial Educational Ministry Foundation(No.04C635) the Hunan Provincial Natural Sciences Foundation of China(No.08JJ3014)
主 题:Samarium chloride hexahydrate Salicylic acid Thioproline Standard molar formation enthalpy
摘 要:[Sm(C7H5O3)2(C4H6NO2S)]·2H2O was synthesized from the reaction of samarium chloride hexahydrate with salicylic acid and thioproline,and characterized by IR,elemental analysis and thermogravimatric *** standard molar enthalpies of the solutions of SmCl3·6H2O(s),2[C7H6O3(s)],[C4H7NO2S(s)] and [Sm(C7H5O3)2·(C4H6NO2S)·2H2O(s)] in a mixed solvent of absolute ethyl alcohol,dimethyl formamide(DMF) and 3 mol/L HCl were,respectively,determined by calorimetry to be ΔsHm^Θ [SmCl3·6H2O(s),298.15 K]=(-46.68±0.15) kJ/mol,ΔsHm^Θ [2C7H6O3(s),298.15 K]=(25.19±0.02) kJ/mol,ΔsHm^Θ [C4H7NO2S(s),298.15 K]=(16.20±0.17) kJ/mol and ΔsHm^Θ {[Sm(C7H5O3)2(C4H6NO2S)]·2H2O(s),298.15 K}=(-81.24±0.67) kJ/*** enthalpy change of the reaction SmCl3·6H2O(s)+2C7H6O3(s)+C4H7NO2S(s)=[Sm(C7H5O3)2(C4H6NO2S)]·2H2O(s)+3HCl(g)+4H2O(l) was determined to be ΔrHm^Θ =(123.45±0.71) kJ/*** the data in the literature,the standard molar formation enthalpy of [Sm(C7H5O3)2(C4H6NO2S)]·2H2O(s) was estimated to be Δf Hm^Θ {[Sm(C7H5O3)2(C4H6NO2S)]·2H2O(s),298.15 K}=(-2912.03±3.1) kJ/mol through Hess' law.