Crystals 2017, 7(3), 75; doi:10.3390/cryst7030075
A Reversible Single-Crystal to Single-Crystal Thermal Phase Transformation of 3-(2-Bromo-4-(1-methylethyl)phenyl)-1,1-dimethyl urea
Benson M. Kariuki 1,*
and Gamal A. El-Hiti 2,*
and Gamal A. El-Hiti 2,*
1
School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
2
Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
*
Authors to whom correspondence should be addressed.
Academic Editors: Alberto Girlando and Anna Painelli
Received: 13 February 2017 / Revised: 1 March 2017 / Accepted: 1 March 2017 / Published: 4 March 2017
Abstract
3-(2-Bromo-4-(1-methylethyl)phenyl)-1,1-dimethylurea was synthesized and structurally characterized at 296 K, 200 K and 140 K. A reversible thermal phase transformation was observed at ~170–180 K. On cooling, the structure transforms from a monoclinic to a triclinic crystal system. The isopropyl group is disordered above the phase transition temperature but is ordered below the transition temperature. View Full-TextKeywords:
crystal-to-crystal; 1,1-dimethylurea; reversible; phase transition; thermal
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Kariuki, B.M.; El-Hiti, G.A. A Reversible Single-Crystal to Single-Crystal Thermal Phase Transformation of 3-(2-Bromo-4-(1-methylethyl)phenyl)-1,1-dimethyl urea. Crystals 2017, 7, 75.
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