title: rac-5-(1-Methyl-eth-yl)-2-sulfanylidene-imidazolidin-4-one.
abstract: In the title compound, C6H10N2OS, the 2-sulfanylideneimidazolidin-4-one fragment is essentially planar (r.m.s. deviation = 0.0033 Å). In the crystal, one amino group is involved in N-H⋯O hydrogen bonding, which links pairs of mol-ecules into inversion dimers, while the other amino group generates weak N-H⋯S hydrogen bonds, which link these dimers into chains in [10-1]. The chains are further aggregated into layers parallel to the ac plane through weak C-H⋯O inter-actions.
authors.affiliation: Instituto de Física - UFG, Caixa Postal 131, 74001-970 Goiânia, GO, Brazil.
authors.forename: Rosane de P
authors.initials: Rde P
authors.lastname: Castro
authors.forename: Fernando C
authors.initials: FC
authors.lastname: Macedo
authors.forename: Tiago O
authors.initials: TO
authors.lastname: Brito
authors.forename: Angelo
authors.initials: A
authors.lastname: de Fátima
authors.forename: José R
authors.initials: JR
authors.lastname: Sabino