醇类在芳烃中的平均缔合度

利用ｗｉｅｂｅ－Ｂａｇｌｅｙ模型及直接从凝固点降低法计算了醇类在苯及对二甲苯中不同浓度下的平均缔合度ｎ＿（ＷＢ）及ｎ＿（ｄｉｒ）。由两种方法处理得到的结果在实验浓度范围内相差不大。在ｘ＿Ａ＜０．１４范围内，ｎ分布在１～４之间。同一溶剂中，在醇的摩尔分数：ｘ＿Ａ相同的条件下，醇的平均缔合度依下列顺序减小。甲醇＞乙醇＞正丙醇＞正丁醇；正丙醇＞异丙醇；正丁醇＞异丁醇＞叔丁醇≥仲丁醇；在不同溶剂中，醇在苯中的ｎ比对二甲苯为大。

A VERAGE DEGKEES OF ASSOCIATION OF ALCOHOLS IN AKOMATIC HYDKOCAKBONS

With Wiebe-Bagley association model and data directly from freezing point depression,n,the average degrees of association of alcohols in benzene,p-xylene were calculated.The results fromboth methods were congruent.Within x_A<0.4,n varies from 1 to 4.In the same solvent and at thesame molarity,n decreases in the order:methanol>ethanol>n-propanol>n-butanol;n-propanol>iso-propanol;n-butanol>iso-butanol>tert-butanol>sec-butanol.In the different solvents,n of each alcohol is larger in benzene than inp-xylene.