The Preparation and Crystal Structures of a Series of Urea Adducts: with Fumaric Acid (2 : 1), with Itaconic Acid (1 : 1) and with Cyanuric Acid (1 : 1)

Abstract

The adducts of a series of compounds with urea (ur) have been prepared and their crystal structures determined by X-ray crystallography. These are the adducts with the unsaturated aliphatic acids fumaric acid [(fumaric acid)(ur)₂] (1) and itaconic acid [(itaconic acid)(ur)] (2), and with cyanuric acid [(cyanuric acid)(ur)] (3). All structures have extensive hydrogen-bonding systems in which most of the urea donor and acceptor sites are involved.