本文合成并研究了2P_0nB、4P_0nB、2Q_0nB等11个三岔共轭化合物的红外光谱。实验表明这些化合物的基因特征吸收波数近似地遵守同系线性规律,相关系数r为0.982-1.000,与相应线性体系的同系直线比较,它们的斜率较小。这表明一个分岔的引入导致基因特征吸收波长红移,并表明在三岔体系中是分子整体性占优势而分岔基团的特性是受到分子整体性制约的。 In this paper, the infrared spectra of eleven trifurfied compounds such as 2P_0nB, 4P_0nB and 2Q_0nB were synthesized and studied. Experiments show that these compounds have similar genealogical wave numbers that obey the homology linear rule with a correlation coefficient r of 0.982-1.000, which shows a small slope compared with the homologous line of the corresponding linear system. This suggests that the introduction of a bifurcation results in a red shift of the wavelength of the characteristic absorption of the gene and indicates that molecular holism predominates in the bifurcation system whereas the properties of the bifurcation group are constrained by molecular integrity.