title: Low-temperature redetermination of 3,4,5,6-tetra-hydro-pyrimidin-2(1H)-one.
abstract: The low-temperature structure of the title compound, C(4)H(8)N(2)O, is ordered, whereas the central methyl-ene groups is disordered in the reported room-temperature structure. The molecule lies across a mirror plane; adjacent mol-ecules are linked by an N-H⋯O hydrogen bond into a chain.
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Mohd Razali
authors.initials: MR
authors.lastname: Rizal
authors.forename: Isha
authors.initials: I
authors.lastname: Azizul
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng