N'-(2-Hy-droxy-3-meth-oxy-benzyl-idene)pyrazine-2-carbohydrazide monohydrate

Zhaodong Wang

doi:10.1107/S2414314619017310

N'-(2-Hy-droxy-3-meth-oxy-benzyl-idene)pyrazine-2-carbohydrazide monohydrate

IUCrdata. 2020 Jan 10;5(Pt 1):x191731. doi: 10.1107/S2414314619017310. eCollection 2020 Jan.

Author

Zhaodong Wang¹

Affiliation

¹ Chongqing Key Laboratory of Environmental, Materials & Remediation Technologies, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, People's Republic of China.

Abstract

In the title hydrated Schiff base, C₁₃H₁₂N₄O₃·H₂O, the dihedral angle between the aromatic rings is 5.06 (11)° and an intra-molecular O-H⋯N hydrogen bond closes an S(6) ring. In the crystal, O_w-H⋯O and O_w-H⋯N (w = water) hydrogen bonds link the components into centrosymmetric tetra-mers (two Schiff bases and two water mol-ecules). Longer N-H⋯O hydrogen bonds link the tetra-mers into [010] chains. A weak C-H⋯O hydrogen bond and aromatic π-π stacking between the pyrazine and phenyl rings [centroid-centroid separations = 3.604 (2) and 3.715 (2) Å] are also observed.

Keywords: Schiff base; acylhydrazone ligand; crystal structure; hydrogen bonding.

Grants and funding

The author would like to thank the major cultivation project of Chongqing University of Arts and Sciences (No. P2017CH10) for financial support.