Jump to main content
Jump to site search

Issue 29, 2013
Previous Article Next Article

The structure of the melamine–cyanuric acid co-crystal

Author affiliations


The crystal structure of the melamine:cyanuric acid (CA.M) adduct has been redetermined and the previously reported cell is shown to be incorrect. The true unit cell has approximately twice the volume of the earlier cell. Crystal data for CA.M: monoclinic, space group I2/m, a = 14.8152(19) Å, b = 9.6353(18) Å, c = 7.0405(9) Å, β = 93.194(11)°, V = 1003.5(3) Å3, Z = 2. In contrast to the previous report, this contains an ordered array of cyanuric acid and melamine. Hydrogen bonding between the two components is described in detail and precise information about intermolecular distances reported for the first time. The structure contains hydrogen-bonded sheets stacked perpendicular to the crystallographic (101) plane. The molecular geometry of the cyanuric acid and melamine components is described in detail. Possible explanations for the difference between this structure and the previous report are described in the light of quantum chemical calculations.

Graphical abstract: The structure of the melamine–cyanuric acid co-crystal

Back to tab navigation

Supplementary files

Article information

23 Apr 2013
03 Jun 2013
First published
06 Jun 2013

This article is Open Access

CrystEngComm, 2013,15, 5838-5843
Article type

The structure of the melamine–cyanuric acid co-crystal

T. J. Prior, J. A. Armstrong, D. M. Benoit and K. L. Marshall, CrystEngComm, 2013, 15, 5838
DOI: 10.1039/C3CE40709H

Social activity

Search articles by author