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

ABSTRACT: 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.

SUBMITTER: Yang QJ

PROVIDER: S-EPMC3007982 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Crystal structure of ethyl 2-(2-{(1E)-[(E)-2-(2-hy-droxy-benzyl-idene)hydrazin-1-yl-idene]meth-yl}phen-oxy)acetate.

Project description:In the title compound, C18H18N2O4, the planes of the benzene rings are twisted with respect to each other at 27.25?(7)°. The mol-ecule displays an extended conformation with an intra-molecular O-H?N hydrogen bond. In the crystal, weak C-H?O inter-actions link the mol-ecules, forming supra-molecular chains running along the b-axis direction.

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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-phenyl-hydrazin-1-yl-idene)acetate.

Project description: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.

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(E)-Ethyl N'-(4-bromo-benzyl-idene)hydrazinecarboxyl-ate.

Project description:The title compound, C(10)H(11)BrN(2)O(2), crystallizes with two independent mol-ecules in the asymmetric unit, in which the dihedral angles between the benzene ring and the hydrazine carboxylic acid mean plane are 3.0 (4) and 45.3 (3)°. The mol-ecules are linked into a one-dimensional network by inter-molecular N-H⋯O hydrogen bonds.

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Project description:Mol-ecules of the title compound, C(13)H(13)N(3), are essentially planar (r.m.s. deviation for all non-H atoms = 0.054?Å). The dihedral angle between the two aromatic rings is 6.33?(5)°. In the crystal, pairs of centrosymmetrically related mol-ecules are linked through N-H?N hydrogen bonds, forming N-H?N dimers with graph-set motif R(2) (2)(8).

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Project description:The title compound PBPEA, C(10)H(7)Br(5)O(2), has its ethyl acetate portion nearly orthogonal to the benzene ring, with a C-C-C-C torsion angle of 88.3 (5)°. The packing involves an inter-molecular contact with a Br⋯Br distance of 3.491 (1) Å, having C-Br⋯Br angles of 173.4 (2) and 106.0 (2)°. The crystal studied was an inversion twin.

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