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N'-[(E)-1-(2-Hy-droxy-phen-yl)ethyl-idene]pyrazine-2-carbohydrazide.


ABSTRACT: The title compound, C13H12N4O2, crystallized with two independent mol-ecules (A and B) in the asymmetric unit. Mol-ecule B is planar to within 0.044?(3)?Å for all non-H atoms, while mol-ecule A is slightly twisted, with a dihedral angle of 6.29?(4)° between the mean planes of the pyrazine-2-carbohydrazide and 1-(2-hy-droxy-phen-yl)ethanone moieties (r.m.s. deviations = 0.0348 and 0.0428?Å, respectively). S(5) and S(6) ring motifs are formed in both mol-ecules due to the presence of intra-molecular O-H?N and N-H?N hydrogen bonds. In the crystal, mol-ecules A and B are linked by a C-H?O hydrogen bond. They stack along the a-axis direction, forming columns with ?-? inter-actions involving inversion-related pyrazine and benzene rings [centroid-centroid distances = 3.5489?(13)-3.8513?(16)?Å].

SUBMITTER: Hameed S 

PROVIDER: S-EPMC3884444 | BioStudies | 2013-01-01T00:00:00Z

REPOSITORIES: biostudies

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