水杨醛邻羟基苯乙酮缩苯胺类Schiff碱的IR和~1HNMR性质

IR and ￣1HNMR Spectral Property of Schiff bases from Salicylaldehyde and 2-Hydroxyacetophenone with Aromatic amines

合成了水杨醛缩苯胺类、邻羟基苯乙酮缩苯胺类两个系列Ｓｃｈｉｆｆ碱化合物共１２个，系统研究了其ＩＲ、ＨＮＭＲ波谱性质。在ＨＮＭＲ谱中，首次得出两个系列Ｓｃｈｉｆｆ碱化合物的羟基质子的化学位移值都与Ｎ－苯基上取代基的Ｈａｍｍｅｔｔ常数有很好的线性关系：δ＝１３．０６－０．７９ａ ｒ＝０．９７ ｎ＝７；δ＝１４．２９－１．６９ａ ｒ＝０．９７ ｎ＝５。

Twelve Schiff base compounds from salicylaldehyde and 2-hydroxyacetophenone with aromatic amines were prepared. The spectral propertystudied by IR and 1HNMR spectra. There was a good linear correlation between the chemical shift of hydroxylic proton and Hammett substituent constants in 1HNMR spectra: δ=13. 06-0. 79σ r=0. 97 n=7; δ= 14. 29-1. 69σ r= 0.97 n= 5.