Binary mixtures of fatty acid derivatives. I. Dihydrazides of dicarboxylic acids‐glutaric to sebacic

Abstract

Summary A simple preparation of the dihydrazides is given. The recrystallized dihydrazides of glutaric, adipic, pimelic, suberic, azelaic, and sebacic acids melted at 176, 182, 185, 187, and 188°C., respectively. The melting point curves are reported for binary mixtures of a) the dihydrazides of adjacent members of the homologous series of dicarboxylic acids from glutaric to sebacic, b) suberic and sebacic dihydrazide, and c) sebacic dihydrazide and stearic hydrazide. The binary mixtures of the dihydrazides show formation of a eutectic containing 52–53 weight per cent of the lower component. The binary mixture of stearic hydrazide and sebacic dihydrazide shows no eutectic by the method used.