title: 4-Amino-2,8-dimethyl-6H-pyrimido[1,2-a][1,3,5]triazin-6-one.
abstract: In the title compound, C(8)H(9)N(5)O, the mean planes through the pyrimidine and triazine rings form a dihedral angle of 2.83 (16)°. The amino group adopts a trigonal-planar configuration and forms an intra-molecular resonance-assisted N-H⋯O=C hydrogen bond with the carbonyl group. In the crystal, mol-ecules are linked via inter-molecular N-H⋯N hydrogen bonds into chains of C(2) (2)(6)[R(2) (2)(6)] motif. The molecules form two types of sheet parallel to (201) and (01), respectively.
authors: Nikhil
authors: N
authors: Sachdeva
authors: Anton V
authors: AV
authors: Dolzhenko
authors: Geok Kheng
authors: GK
authors: Tan
authors: Lip Lin
authors: LL
authors: Koh
authors: Wai Keung
authors: WK
authors: Chui
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr Sect E Struct Rep Online. 2009 Mar 06;65(Pt 4):o684
references: 21582426