烷烃沸点的递变函数

本文从烷烃沸点Ｔｂ与结构重复单元数Ｎ间的三个待选四参数拟合函数中甄别出一个高准确度的计算公式：Ｔｂ＝ｄｌｎ〔（Ｎ＋ｃ）／（ａＮ＋ｂ）〕该式对直链及四个支链同系物的９２组烷烃沸点的计算表明，各系列计算值与实验值的最大绝对误差小于２Ｋ，最大残差均方小于０．８Ｋ，９２组绝对误差平均值小于０．５Ｋ．

Recurrence Function of Boiling Point of Alkanes

In this paper,a high accurate formula, T b=d ln (N c)/(aN b) ,has been developed from three functions with four parameters selected between boiling points of alkanes T b and their structural repeated unit number N.The formula is used to calculate 92 straight chain alkanes and branch chain alkanes.The results show that the maximum absolute error between the calculated values of these alkanes and their experimental values is less than 2K,and predictive residual sum of squares less than 0 8K.The average absolute error of the 92 data is less than 0 5K.