碳原子价轨道电负性对化学键性能的影响

曹朝暾

The Influence of the Electronegativity of Valence Orbital of Carbon Atom on the Chemical Bond Property

Chao-Tun CAO

表2 一些代表化合物的X―C键能

键X―C C价轨道电负性a 键能b/(kJ·mol-1) H―C2H5 2.5861 420.5 ± 1.3 H―CHCH2 2.677 465.3 ± 3.3 H―C6H5 2.677 472.2 ± 2.2 H―CCH 2.858 557.81 ±0.30 Cl―CH3 2.586 350.2 ± 1.7 Cl―C2H5 2.586 352.3 ±3.3 Cl―CHCH2 2.677 396.5 ± 4.8 Cl―C6H5 2.677 399.6 ± 6.3 Cl―CCH 2.858 435.6 ± 8.4 Br―CH3 2.586 294.1 ±2.1 Br―C2H5 2.586 292.9 ± 4.2 Br―CHCH2 2.677 332.2 ± 6.3 Br―C6H5 2.677 336.4 ± 6.3 Br―CCH 2.858 410.5 1―CH3 2.586 238.9 ± 2.1 I―C2H5 2.586 233.5 ± 6.3 I―CHCH2 2.677 276.3 I―C6H5 2.677 272 ± 4.2 I―CCH 2.858 329.9 HO―CH3 2.586 384.93 ± 0.71 HO―C2H5 2.586 391.2 ±2.9 HO―CHCH2 2.677 464.8 HO―C6H5 2.677 463.36 ± 4.20 HO―CCH 2.858 563.2 Me—Et 2.586 364.8 Et―Et 2.586 364.8 Me―CHCH2 2.631 422.2 Et―CHCH2 2.631 416.7 Me―CCH 2.719 516.7 CH2CH―CHCH2 2.677 485.3 CH2CH―CCH 2.766 559.0 HCC―CCH 2.858 648.5