Heat Capacity and Enthalpy of Fusion of Crystalline Pyrimethanil Decylate(C_(22)H_(33)N_3O_2)  

作　　者：SUN Xiao-hong LIU Yuan-fa TAN Zhi-cheng WANG Mei-han JIA Ying-qi 

机构地区：[1]College of Chemical Engineering, Chemical Research Institute, Northwest University, Xi＇an 710069, P. R. China [2]Department of Chemistry, Northwest University, Xi＇an 710069, P. R. China [3]Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China

出　　处：《Chemical Research in Chinese Universities》2005年第6期697-701,共5页高等学校化学研究（英文版）

基　　金：SupportedbytheNationalNaturalScienceFoundationofChina(No.20073047)andtheNaturalScienceFoundationofShanxiProvince(No.2001H11).

摘　　要：Low-temperature heat capacities of pyrimethanil decylate （ C22 H33 N3 O2 ） were precisely measured with an automated adiabatic calorimeter over the temperature range from 78 to 373 K. The sample was observed to melt at （311.04 ± 0.06） K. The molar enthalpy and entropy of fusion as well as the chemical purity of the compound were determined to be（45876± 12） J/mol, （147. 50 ±0. 05） J. mol^-1 · K^-1 and （99. 21 ±0. 03）% （mass fraction）, respectively. The extrapolated melting temperature for the absolutely pure compound obtained from fractional melting experiments is （311. 204±0. 035 ） K.Low-temperature heat capacities of pyrimethanil decylate （ C22 H33 N3 O2 ） were precisely measured with an automated adiabatic calorimeter over the temperature range from 78 to 373 K. The sample was observed to melt at （311.04 ± 0.06） K. The molar enthalpy and entropy of fusion as well as the chemical purity of the compound were determined to be（45876± 12） J/mol, （147. 50 ±0. 05） J. mol^-1 · K^-1 and （99. 21 ±0. 03）% （mass fraction）, respectively. The extrapolated melting temperature for the absolutely pure compound obtained from fractional melting experiments is （311. 204±0. 035 ） K.

关 键 词：Pyrimethanil decylate Heat capacity Adiabatic calorimetry DSC 

分 类 号：O626[理学—有机化学]