Identification of aromatic compounds as simple azines by paper and thin-layer chromatography.

Abstract

Abstract A method is described for the separation of carbonyls as simple azines by paper and thin-layer chromatography. Schleicher and Schull 2040 a gl. papers were used in paper chromatography. Extensive data are given for separations on papers impregnated with N,N-dimethylformamide in: (I) N,N-dimethylformamide—cyclohexane; (2) dibytl ether—tetrahydrofuran—N,N-dimethylformamide;(3) cyclohexane— N,N-dimethylformamide—carbon tetrachloride; (4) cyclohexane—N,N-dimethylformamide —ethyl acetate—water; and (5) decalin—N,N-dimethylformamide. Separations were also performed on papers impregnated with methylformanilide in cyclohexane— formanilide. Thin-layer separations were performed on silica gel in benzene; ethyl acetate—hexane; benzene—paraffin—acetic acid—water; dibutyl ether—tetrahydrofuran; dichloromethane; and decalin—dichloromethane—methanol. An example of the thin-layer separation of an automobile exhaust sample is given.