(E)-N′-(2,3,4-Trihydroxybenzylidene)isonicotinohydrazide dihydrate
نویسندگان
چکیده
In the title isoniazid derivative, C(13)H(11)N(3)O(4)·2H(2)O, the Schiff base mol-ecule exists in an E configuration with respect to the acyclic C=N bond. An intra-molecular O-H⋯N hydrogen bond forms a six-membered ring, producing an S(6) ring motif. The essentially planar pyridine ring [maximum deviation = 0.0119 (8) Å] is inclined at a dihedral angle of 7.30 (4)° with respect to the benzene ring. In the crystal, inter-molecular O-H⋯N, O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into two-dimensional arrays lying parallel to the (10) plane. These arrays are further inter-connected into a three-dimensional extended network via O-H⋯O and C-H⋯O hydrogen bonds. A weak inter-molecular π-π inter-action [centroid-to-centroid distance = 3.5627 (5) Å] is also observed.
منابع مشابه
(E)-1-(2,4,6-Trihydroxybenzylidene)-4-ethylthiosemicarbazide dihydrate
In the title mol-ecule, C(10)H(13)N(3)O(3)S·2H(2)O, the thio-semi-carbazide =N-NH-C(=S)-NH- fragment [torsion angle = 0.2 (1)°] is nearly coplanar with the benzene ring [dihedral angle = 2.4 (1)°]. The benzene ring and semicarbazide moiety are located on opposite sites of the C=N bond, showing an E configuration. The hy-droxy, imino and water H atoms are engaged in extensive hydrogen bonding, f...
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In the title compound, C(16)H(17)N(3)O(4), the mol-ecule exists in an E configuration with respect to the C=N double bond. The mol-ecule is not planar, the dihedral angle between the pyridine and benzene rings being 71.67 (8)°. In the crystal structure, mol-ecules are linked into chains along the b axis by bifurcated N-H⋯O and C-H⋯O hydrogen bonds. These chains are linked into a three-dimension...
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