Abstract
A study of the thin-layer chromatographic behavior of 27 aromatic amines on plain silica gel G and on silica gel layers impregnated with aqueous solutions of various sodium salts (i.e., chloride, hydroxide, nitrate, nitrite, acetate, sulfate, and hydrogen phosphate) is presented. Cyclohexane-benzene (1 :4) was used as the mobile phase. The results obtained on impregnated layers are compared with those achieved on plain (unimpregnated) silica gel layers. The effects of the nature of substituent groups and the number of carbon atoms in the molecule on the mobility of amines is discussed. A linear relationship between R f values and the nature of substituent groups is observed, which allows a possible separation of substituted aromatic amines.
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