醇/烃系统的分子热力学(Ⅰ)红外光谱法研究醇的缔合常数  

MOLECULAR THERMODYNAMICS FOR ALCOHOL-HYDROCARBON SYSTEMS (I)ASSOCIATION CONSTANTS OF ALCOHOLS FROM INFRARED SPECTRA

作　　者：洪建康 韩崇家[2] 胡英[2] 

机构地区：[1]上海医药设计院,上海200040 [2]华东化工学院化学系,上海200237

出　　处：《化工学报》1993年第1期1-9,共9页CIESC Journal

摘　　要：利用FTIR-Sx20红外光谱仪进行了3个不同温度下甲醇、乙醇、丙醇、丁醇、己醇、辛醇和癸醇与3种不同溶剂(苯、正己烷、环己烷)共21个系统的红外光谱测定,谱图经分峰处理后,得到了单体、线性二缔体和环状四缔体的峰位、峰高和半峰宽与表观浓度之间的定量关系.计算时采用RK方程,考虑醇分子与溶剂分子间的物理相互作用,由此求得线性二缔和环状四缔时醇的标准缔合常数和缔合焓.Infrared spectra for altogether 21 binary systems of methanol, ethanol, propanol, butanol, hexanol,octanol and decanol with three solvents of benzene, hexane and cyclohex-ane at 25, 35 and 45℃ were measured using FTIR Sx20 spectrometer. The spectra were separated by peak - resolution technique. Quantitative relationships between true concentrations of associated species and phenomenological concentrations of alcohols were then calculated by peak -heights and full widths at half -maximum. The RK equation was used to take into account physical interactions between molecules. Standard association constants and corresponding enthalpies of association of linear dimerization and cyclotetramerization for those alcohols were then obtained.

关 键 词：缔合常数 醇 红外光谱 醇/烃系统 

分 类 号：O623.411[理学—有机化学]