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本文合成了四个4′-苯多烯酰基苯并15-冠-5和一个4′-苯酰基苯并15-冠一5等五个三岔共轭化合物。测定了它们的电子吸收光谱,红外光谱。并用同系因子(1/2)~(2/N)考查了这类三岔共轭体系的同系递变关系。用相似三角形法计算的较短分岔基团苯并15-冠-5的代基当量值△N_5为0.854。这表明苯并15-冠-5不权起代基作用而且它与羰基之间还有一定的共轭作用,约相当于一个双键。此外,还合成了四个3′,4′-二甲氧基苯多烯酮类化合物,将它们的电子光谱与冠醚查耳酮类化合物的进行了比较。
In this paper, four 4’-benzenepolynylbenzo-15-crown-5 and one 4-benzoylbenzo-15-crown-5 were synthesized. Their electron absorption spectra and infrared spectra were measured. The homology variation of this kind of trifurcated conjugate system was investigated by using the same factor (1/2) ~ (2 / N). The equivalent weight ΔN_5 of benzo 15-crown-5, the shorter-branched bidentate group calculated using the similar triangulation method, was 0.854. This indicates that the benzo 15-crown-5 does not have the substituent and has a certain conjugation with the carbonyl group, which corresponds to about one double bond. In addition, four 3 ’, 4’-dimethoxybenzoinones were also synthesized and their electronic spectra were compared with those of the crown ether chalcone compounds.