The Interaction of 3,6-dihydrazino-s-tetrazine with Some Aliphatic Aldehydes

The condensation of 3,6-dihydrazino-s-tetrazine with a number of the substituted and unsubstituted aliphatic aldehydes has been studied; this reaction procedure conditions have been determined; the isomeric composition of the corresponding hydrazones has been identified. The addition of the unsubstituted aldehydes to the reaction has been shown to result in the selective formation of E-isomers while α - or β- substituted aldehydes form the mixture of Z,E-isomers of azomethynes. It has been found that 3,6-bis(allylidenehydrazino)-s-tetrazine in the solution of dimethylsulfoxide corresponds to the aromatic form (87.5%) and chinoid form (12.5%). The effect of pH medium on 3,6-Bis (allylidenehydrazino)-s-tetrazine in the solutions has been studied. The presence of the double bonds in the allylic fragment has been found out to promote deeper conjugation followed by the chinoid structure formations.