N′-Cyclopentylidenepyridine-4-carbohydrazide
نویسندگان
چکیده
The title compound, C(11)H(13)N(3)O, is a derivative of the anti-tuberculosis drug isoniazid [systematic name: pyridine-4-carbohydrazide]. The crystal structure consists of repeating hydrogen-bonded chains parallel to the b axis. Adjacent mol-ecules in the chains are linked by bifurcated N-H⋯(O,N) hydrogen bonds, which form an R(1) (2)(5) ring motif.
منابع مشابه
N′-tert-Butyl-N′-(3,5-dimethylbenzoyl)-2,2-dimethyl-4-oxochroman-6-carbohydrazide
In the crystal structure of the title compound, C(25)H(30)N(2)O(4), the steric size of the tert-butyl group causes the 3,5-dimethyl-phenyl ring to adopt a transoid geometry with respect to the N-C(O) bond. The six-membered heterocyclic ring is disordered over two sites, with occupancies of 0.553 (4) and 0.447 (4). Intra-molecular C-H⋯O inter-actions are present. In the crystal, mol-ecules are l...
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The title compound, C(16)H(12)N(2)O(4)S, was obtained by the condensation of 3-acetyl-4-hy-droxy-coumarin with thien-2-ylcarbonyl hydrazide. The pyran ring adopts a 2,4-dione tautomeric form. The benzopyran ring system is almost coplanar with the thio-phene ring [dihedral angle 0.9 (2)°]. The exocyclic C=C double bond has an E geometry. The mol-ecular conformation is stabilized by an intra-mole...
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In the title compound, C(18)H(16)N(4)O(2), the plane defined by the ethyl C atoms and the attached N atom is inclined to the adjacent pyridine ring at an angle of 67.87 (16)°. The dihedral angle between the two heterocyclic rings is 3.33 (16)°. The mol-ecular conformation is stabilized by an intra-molecular N-H⋯O hydrogen bond and the crystal structure by inter-molecular C-H⋯O hydrogen bonds, f...
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The asymmetric unit of the title hydrazone compound, C(15)H(10)BrClN(2)O(4), contains two independent mol-ecules. The dihedral angles between the benzene rings are 38.7 (3)° in one mol-ecule and 24.3 (3)° in the other. Both mol-ecules exist in trans conformations with respect to the C=N double bonds of the central methyl-idene units. Intra-molecular O-H⋯N contacts are observed in both mol-ecule...
متن کاملCrystal structure of N′-diphenylmethylidene-5-methyl-1H-pyrazole-3-carbohydrazide
In the title compound, C18H16N4O, the planes of the phenyl rings are approximately perpendicular to each other [dihedral angle = 78.07 (8)°] and form dihedral angles of 56.43 (8) and 24.59 (8)° with the pyrazole ring. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds to form one-dimensional chains parallel to the [010] direction.
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