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Isothiocyanates. IV. Preparation of o-isothiocyanate derivatives of dimethylaminoazobenzene

K. AntoŇ°

Slovak Technical University, Bratislava


Abstract: The synthesis of 2-isothiocyanato-3-methyl-4',4'-dimethylazobenzene and a chromatographic sepn. of the other o-amino derivs. of dimethylaminoazobenzene into the cis and trans isomers was described. The prepd. isothiocyanates were detd. by infrared absorption spectra. The cis and trans isomers were detd. by absorption max. in the visible and near ultraviolet area, where the trans isomers show max. in the vicinity of 360 mμ and cis isomers in the vicinity of 440 mμ. The nonreactivity of o-amino derivs. of dimethylaminoazobenzene and the formation of 5 and 6 member rings of cis and trans forms by H bridges was discussed.

Full paper in Portable Document Format: 143a187.pdf (in Slovak)


Chemical Papers 14 (3) 187–208 (1960)

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