用Taftσ~*常数计算基团电负性  

CALCULATION OF GROUP ELECTRONEGATIVITY WITH Taft σ *

作　　者：张凤莲 

机构地区：[1]包头高等师范专科学校地理系,内蒙古包头014030

出　　处：《内蒙古师范大学学报（自然科学汉文版）》1999年第3期206-209,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

摘　　要：注意到 Ｔａｆｔ σ常数只包含诱导效应，应与基团电负性之间存在较好的线性关系： Ｘ＝ ０ ．２８ σ ＋ ２ ．１９ ．运用该式求出常见基团的电负性值与 Ｂｒａｔｓｃｈ 基团电负性及诱导效应指数均有较好的对应关系，对组成相同而结构不同的基团较之 Ｂｒａｔｓｃｈ 值有较好的区分性．The fact that Taft σ * constant concerns only with inductive effects is taken into consideration,thus,it should be found good linear relationship with group electronegativity: X=0.28σ *+2.19 .Group electronegativity calculated from this equation corresponds soundly to Bratsch group electronegativity and the exponent of inductive effects.Also,it shows clear distinctiveness for the groups with same constituents but different structures than Bratsch values do.

关 键 词：Taftó^＊常数 基团 电负性 诱导效应指数 

分 类 号：O621.12[理学—有机化学]