title: 3,5,3',5'-Tetra-methyl-4,4'-bi(1H-pyrazol-yl) hemihydrate.
abstract: In the title compound, C(10)H(14)N(4)·0.5H(2)O, the amino H atom of one of the two pyrazole rings is disordered over its two N atoms in a 1:1 ratio. The pyrazole rings are aligned at 60.1 (1)°. In the crystal, two bipyrazolyl mol-ecules are linked by an N-H⋯N hydrogen bond, generating a dimer; the dimer is connected to the water mol-ecule, which lies on a twofold rotation axis, resulting in the formation of a chain that makes an angle of ca 45.3 (1)° with the ab plane. The chains are cross-linked by N-H⋯O and O-H⋯N inter-actions, forming a three-dimensional network.
authors.affiliation: Tianmu College of ZheJiang A & F University, Lin'An 311300,  People's Republic of China.
authors.forename: Shouwen
authors.initials: S
authors.lastname: Jin
authors.forename: Yanfei
authors.initials: Y
authors.lastname: Huang
authors.forename: Hao
authors.initials: H
authors.lastname: Fang
authors.forename: Tianyi
authors.initials: T
authors.lastname: Wang
authors.forename: Liangliang
authors.initials: L
authors.lastname: Ding