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Ethyl (Z)-2-chloro-2-(2-phenyl-hydrazin-1-yl-idene)acetate.

ABSTRACT: The title compound, C(10)H(11)ClN(2)O(2), features an almost planar C(ar)-N(H)-N=C(Cl) unit [torsion angle = 0.8 (1)° whose phenyl substituent is almost coplanar with it [dihedral angle = 2.8 (2)°]; this unit is slightly twisted with respect to the carboxyl -CO(2) fragment [dihedral angle = 10.3 (2)°]. In the crystal, the amino group acts as a hydrogen-bond donor to the carbonyl O atom of an adjacent mol-ecule; the hydrogen bond generates a helical chain that runs along the b axis of the monoclinic unit cell.

SUBMITTER: Asiri AM

PROVIDER: S-EPMC3007979 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Ethyl 2-chloro-[2-(4-chloro-phen-yl)hydrazin-1-yl-idene]acetate.

Project description:The title compound, C(10)H(10)Cl(2)N(2)O(2), features a planar C(ar)-N(H)-N=C(Cl) unit [torsion angle = 5.5 (4)°] whose benzene substituent is coplanar with it [dihedral angle = 4.7 (4)°]; this unit is slightly twisted with respect to the carboxyl -CO(2) fragment [dihedral angle = 2.2 (52)°]. The amino group acts as a hydrogen-bond donor to the carbonyl O atom of an adjacent mol-ecule; the hydrogen bond generates a helical polymer that runs along the b axis of the monoclinic unit cell.

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Ethyl (Z)-2-chloro-2-[2-(4-meth-oxy-phenyl)hydrazin-1-yl-idene]acetate.

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3-Chloro-6-[(E)-2-(1-phenyl-ethyl-idene)hydrazin-yl]pyridazine.

Project description:Two independent mol-ecules are present in the asymmetric unit of the title compound, C(12)H(11)ClN(4), (Z' = 2): the dihedral angles between the phenyl and pyridizine rings are 8.35?(10) and 37.64?(6)°. In the crystal, the two mol-ecules form inversion dimers with R(2) (2)(8) ring motifs through inter-molecular N-H?N hydrogen bonds. The crystal structure is stabilized by ?-? inter-actions between the pyridazine rings of symmetry-related molecules. In one of the independent mol-ecules, the centroid-centroid separations are 3.6927?(13) and 3.7961?(13)?Å, whereas in the other, the separations are 3.6909?(13) and 3.9059?(13)?Å.

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Ethyl 2-[(Z)-2-benzyl-hydrazin-1-yl-idene]-2-bromo-acetate.

Project description:In the title compound, C(11)H(13)BrN(2)O(2), the dihedral angle between the phenyl ring and the almost planar (r.m.s. deviation = 0.011 Å) C-C(Br)=N-N(H)- fragment is 74.94 (16)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, which generate C(6) chains propagating in [010]. Weak aromatic π-π stacking [centroid-centroid separation = 3.784 (3) Å] may also help to consolidate the packing.

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Ethyl (3E)-3-[2-(4-bromo-phenyl-sulfon-yl)hydrazin-1-yl-idene]butano-ate.

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1-Chloro-1-[(Z)-2-phenyl-hydrazin-1-yl-idene]propan-2-one.

Project description:The title compound, C(9)H(9)ClN(2)O, is close to planar (r.m.s. deviation for the non-H atoms = 0.0446 Å); it exists in a cis conformation with respect to the C=N double bond. In the crystal, the ketone O atom accepts both N-H⋯O and C-H⋯O hydrogen bonds, which leads to [010] infinite chains incorporating R(2) (1)(6) loops. The crystal structure also features a C-H⋯π inter-action.

| S-EPMC3394046 | biostudies-literature

Crystal structure of 4-{(E)-[2-(pyridin-4-ylcarbon-yl)hydrazin-1-yl-idene]meth-yl}phenyl acetate monohydrate.

Project description:The asymmetric unit of the title compound, C15H13N3O3·H2O, comprises a 4-{(E)-[2-(pyridin-4-ylcarbon-yl)hydrazinyl-idene]meth-yl}phenyl acetate mol-ecule and a solvent water mol-ecule linked by O-H?O and O-H?N hydrogen bonds from the water mol-ecule and a C-H?O contact from the organic mol-ecule. The compound adopts an E conformation with respect to the azomethine bond and the dihedral angle between the pyridine and benzene rings is 21.90?(7)°. The azomethine bond [1.275?(2)?Å] distance is very close to the formal C=N bond length, which confirms the azomethine bond formation. An extensive set of O-H?O, O-H?N, N-H?O and C-H?O hydrogen bonds builds a two-dimensional network progressing along the c axis.

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