水溶液中五种酰胺与甲醇分子间的焓相互作用研究  

The Study of the Enthalpic Interactions between Five Kinds of Acidamides and Methanol in Aqueous Solutions

作　　者：郑晓雯[1] 孙海涛[2] 

机构地区：[1]济宁学院化学系,273155 [2]曲阜师范大学化学科学学院,山东省曲阜市273165

出　　处：《曲阜师范大学学报（自然科学版）》2008年第4期88-92,共5页Journal of Qufu Normal University(Natural Science)

摘　　要：利用2277热活性检测仪的流动测量系统测定了310.15K时,甲酰胺、N,N-二甲基甲酰胺、乙酰胺、N-甲基乙酰胺、N,N-二甲基乙酰胺分别与甲醇在水溶液中混合过程焓变以及各自的稀释焓,根据Mc-Millan-Mayer理论关联得到了各级焓作用系数.讨论了不同酰胺与甲醇分子的相互作用机制.结果表明,甲醇与不同酰胺分子的hxy均为正.不同酰胺与甲醇的hxy大小主要取决于酰胺分子结构的差异,酰胺分子中所含-CH3个数越多,其hxy值越大,故N,N-二甲基乙酰胺与甲醇的焓对作用系数hxy最大,并用溶质-溶质相互作用和溶质-溶剂相互作用理论对结果进行解释.The enthalpies of mixing of aqueous five kinds of acidamides solutions and methanol solution have been determined at 310.15 K by 2277 flow microcalorimetric system. The data have been analyzed in terms of the McMillan-Mayer theory to obtain the enthalpic pair interaction coefficient （hxy） and compared with them. The resuits show that hxy values between different acid amides and methanol denpend on the structures of acidamides. Because of the most - CH3 in N, N - dimethyl acetamide, its hxy values is biggest. The results are discussed in terms of solute-solute and solute-solvent interactions theory.

关 键 词：酰胺 甲醇 焓对作用系数 

分 类 号：O542.3[理学—物理]