Acta Crystallographica Section E (May 2008)
Low-temperature redetermination of 3,4,5,6-tetrahydropyrimidin-2(1H)-one
Abstract
The low-temperature structure of the title compound, C4H8N2O, is ordered, whereas the central methylene groups is disordered in the reported room-temperature structure. The molecule lies across a mirror plane; adjacent molecules are linked by an N—H...O hydrogen bond into a chain.