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制备和合成了三个线性系列(A_n,K_n,T_n)和三个三岔系列(P_n,E_n,M_n)共34个化合物,其中14个为新化合物。测定了它们在环己烷、乙醇、氯仿中的电子吸收光谱。实验表明,三岔系列的电子吸收光谱频率也遵守同系线性规律,与同系因子之间的相关系数均在0.995以上。三岔体系与相应的线性系列的同系直线相比较表明,一个吸电子分岔的引入导致了红移。用同系直线间的相似三角形计算法,可计算出三岔体系中一个分岔的当量仅为一个链节的0.4～0.8;用同系线性规律的专一性证明,分岔端基的当量是2而不是3.这都表明,分岔端基中只有一岔起端基作用,而另一岔只起代基的作用。取起代基作用的分岔基团的代基当量,并考虑位置效应,则可用线性体系扩大的同系方程来计算三岔化合物的电子吸收光谱。计算值与实验值的误差在±5nm以内。这些结果都与前文的结论相符。三岔体系的溶剂效应比较显著,而且随链增长而增大;线性体系的溶剂效应不如三岔体系的明显,且随链增长变化不大(K_n,A_n)或变小(T_n)。所以,在比较三岔体系与线性体系的同系直线时,必须考虑溶剂的影响。若用溶剂效应较强的溶剂时,三岔同系直线与线性体系的同系直线几乎平行.
Three linear series (A_n, K_n, T_n) and three triad series (P_n, E_n, M_n) were synthesized and synthesized, of which 14 were new compounds. Their electronic absorption spectra were measured in cyclohexane, ethanol and chloroform. The experiment shows that the electronic absorption spectrum frequency of Sancha series also obeys the homology linear rule, and the correlation coefficient with the same factor is above 0.995. Comparison of the trifurcated system with the homologous line of the corresponding linear series shows that the introduction of an electron-attractive bifurcation results in a redshift. Using the method of similarity triangulation between homologous straight lines, the equivalent of one bifurcation in the bifurcation system can be calculated to be only 0.4 ~ 0.8 for one chain link. The equivalence of the bifurcation end groups is proved to be 2 Instead of 3. This shows that only one end of the bifurcation ends play the role of the end group, and the other bifurcation only plays the role of the substituting. Taking the substituent equivalent of the bifurcation group of the substituent and considering the position effect, the electron absorption spectrum of the bifunctional compound can be calculated using the extended homologous equation of the linear system. The calculated value and the experimental value of the error within ± 5nm. These results are consistent with the previous conclusion. The solvent effect of the trifurcation system is significant and increases with the chain growth. The solvent effect of the linear system is not as obvious as that of the trifurcation system, and the variation with chain growth is small (K_n, A_n) or smaller (T_n). Therefore, when comparing the homology lines between the trifurcated system and the linear one, one must consider the effect of the solvent. If the solvent effect of a strong solvent, the same line with the three straight line system with the linear parallel almost parallel.