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测定了卤代苯基四氟硼酸重氮盐－１８－冠醚－６络合物的远红外光谱（５００－１００ｃｍ－１），确立了该体系的光谱频率与取代基常数间的定量关系为下列形式的Ｈａｍｍｅｔｔ方程：ｐ（ｃｍ－１）＝２４８．５十４．００５σ１－１５．８４σＲ。
The far-infrared spectrum (500-100cm-1) of the diazonium-18-crown-6 complex of halophenyl phenyl tetrafluoroborate was determined and the quantitative relationship between the spectral frequency and the substituent constants was established as The Hammett equation of the form: p (cm-1) = 248.5 ten 4.005σ1-15.84σR.