The cyanuric acid–biuret co-crystal: a new type of hydrogen-bonded system formed between a molecule and its solution-phase decomposition product

Abstract

Crystallization from a warm solution of biuret in methanol–water yields a monophasic sample of 1 : 1 co-crystals of biuret and its decomposition product cyanuric acid; these co-crystals are constructed from two types of hydrogen-bonded array consisting of, respectively, linear chains of cyanuric acid molecules and chains of alternating cyanuric acid and biuret molecules.