title: Crystal structure of 3-mesityl-1-[(pyridin-2-yl)meth-yl]-3,4,5,6-tetra-hydro-pyrim-idin-1-ium bromide monohydrate.
abstract: In the title hydrated salt, C19H24N3 (+)·Br(-)·H2O, the values of the N-C bond lengths within the tetra-hydro-pyrimidinium ring indicate delocalization of the N=C double bond. In the cation, the dihedral angle formed by the pyridine and benzene rings is 14.97 (12)°. In the crystal, ions and water mol-ecules are linked by O-H⋯Br, O-H⋯N, C-H⋯Br and C-H⋯O hydrogen bonds into chains running parallel to the b axis.
authors.affiliation: College of Chemistry and Chemical engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Quo
authors.affiliation: College of Chemistry and Chemical engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.
authors.forename: Liangru
authors.initials: L
authors.lastname: Yang
authors.affiliation: College of Chemistry and Chemical engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.
authors.forename: Pu
authors.initials: P
authors.lastname: Mao
authors.affiliation: College of Chemistry and Chemical engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.
authors.forename: Yongmei
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: College of Chemistry and Chemical engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.
authors.forename: Jinwei
authors.initials: J
authors.lastname: Yuan
keywords: NHC precursor; crystal structure; hydrogen bonding; tetra­hydro­pyrimidinium