【摘要】 本文从芳香族同系物的电子光谱来研究各种取代基的效应,以及它们之间的相互影响。对芳香族同系物中取代基位置效应,提出了一个广泛适用的经验公式。并应用于十二个系列的苯烯链,对联苯链,及呋喃烯链化合物。应用扩大的同系直线方程式,计算了300多个化合物的电予吸收峰的波长(p-带)。结果表明计算数值与实验值相比,偏离在±5mμ以下的约占70％,在±5mμ至±10mμ之间约占26％,在±10mμ以上只约占4％。 取代基当量值s_j与Hammett方程的σ常数之间具有良好的线性关系,表明它们所表示的结构因素是平行的,但S_j比σ常数应用范围更为广泛。更多还原

【Abstract】 In this paper the effect of substituent groups in the electronicabsorption spectra of aromatic homologous compounds has been studied.For the positional effect of substituent groups on the homologous chainas well as the aromatic ring, an empirical formula of wide applicabilityhas been suggested, and used to twelve series of phenyl polyeniccompounds, p—polyphenyl compounas, and furan polyenic compounds.By means of the extended homologous linear equations, the wavelengthsof the electronic absorption maximum of p - bands for more than threehundred compounds have been calculated. The results indicate that about70% of the total of the compounds shows deviation of ≤±5 mμ, andabout 26% with deviation of ±5 mμ to ± 10mμ. Only about 4% of thetotal shows deviation greater than ± 10mμ. It has been shown that a good linear relationship exists betweensystematically calculated substituent equivalent values Sj and the Hammettσ constants. This seems to indicate that the structural factors whichthey represent are in complete parallel. However, Sj is of much widerscope of application than the σ constant on the position effect of substituent groups.更多还原