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Ethyl 2-[2-(2-meth-oxy-phen-yl)hydrazinyl-idene]-3-oxobutano-ate.

ABSTRACT: In the title compound, C(13)H(16)N(2)O(4), an intra-molecular N-H?O hydrogen bond generates an S(6) ring. The mol-ecule adopts an E configuration with respect to the central C=N double bond. In the crystal, symmetry-related mol-ecules are connected into chains along [010] via weak C-H?N hydrogen bonds. The crystal structure is further stabilized by weak C-H?? inter-actions.

SUBMITTER: Fun HK

PROVIDER: S-EPMC3201242 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature

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Ethyl 2-[2-(2-meth-oxy-phen-yl)hydrazinyl-idene]-3-oxobutano-ate.

Fun Hoong-Kun HK Hemamalini Madhukar M Shetty Shobhitha S Kalluraya Balakrishna B

Acta crystallographica. Section E, Structure reports online 20110914 Pt 10

In the title compound, C(13)H(16)N(2)O(4), an intra-molecular N-H⋯O hydrogen bond generates an S(6) ring. The mol-ecule adopts an E configuration with respect to the central C=N double bond. In the crystal, symmetry-related mol-ecules are connected into chains along [010] via weak C-H⋯N hydrogen bonds. The crystal structure is further stabilized by weak C-H⋯π inter-actions. ...[more]

PMID: 22058737

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Ethyl 2-[2-(3-meth-oxy-phen-yl)hydrazinyl-idene]-3-oxobutano-ate.

Project description:The title compound, C(13)H(16)N(2)O(4), is approximately planar (r.m.s. deviation = 0.065?Å for the 19 non-H atoms). An intra-molecular N-H?O hydrogen bond generates an S(6) ring motif and the mol-ecule adopts an E conformation with respect to the central C=N double bond. In the crystal, pairs of inter-molecular C-H?O hydrogen bonds link adjacent mol-ecules into inversion dimers. The crystal structure also features weak C-H?? inter-actions.

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Ethyl 2-[(2,4-difluoro-phen-yl)hydrazinyl-idene]-3-oxobutano-ate.

Project description:The asymmetric unit of the title compound, C(12)H(12)F(2)N(2)O(3), contains two mol-ecules, both of which exist in an E conformation with respect to their C=N bonds [1.321?(6) and 1.310?(6)?Å]. The mol-ecular conformations are supported by intra-molecular N-H?O hydrogen bonds, which generate S(6) rings. In the crystal, mol-ecules are linked by C-H?O and C-H?F hydrogen bonds into layers lying parallel to (001). The crystal studied was an inversion twin with a 0.58?(1):0.42?(1) domain ratio.

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1-(2-Meth-oxy-phen-yl)-2-{[2-(2-meth-oxy-phen-yl)hydrazinyl-idene](nitro)-meth-yl}diazene.

Project description:In the title compound, C(15)H(15)N(5)O(4), a nitro-formazan derivative, the formazan unit is essentially planar with an r.m.s. deviation of 0.0204?(6)?Å and adopts a closed syn,s-cis configuration with an intra-molecular N-H?N hydrogen bond. The formazan plane makes dihedral angles of 4.32?(5) and 24.35?(5)° with the benzene rings. The dihedral angle between the formazan plane and the nitro group is 12.58?(8)°. In the crystal, C-H?O inter-actions connect the mol-ecules into an inversion dimer.

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Methyl 2-meth-oxy-4-{[2-(4-nitro-phen-yl)hydrazinyl-idene]meth-yl}benzoate.

Project description:The mol-ecule of the title Schiff base compound, C(16)H(15)N(3)O(5), obtained from a condensation reaction of 4-acet-oxy-3-meth-oxy-benzaldehyde and 4-nitro-phenyl-hydrazine, adopts an E geometry with respect to the C=N double bond. The mol-ecule is roughly planar, with the two benzene rings twisted slightly with respect to each other by a dihedral angle of 6.90 (9)°. In the crystal, inter-molecular N-H⋯O hydrogen bonds link centrosymmetrically related pairs of mol-ecules, forming dimers of R(2) (2)(22) graph-set motif. The dimers are further connected through slipped π-π inter-actions between symmetry-related benzene rings [centroid-centroid distance of 3.646 (1) Å, offset angle of 15.4°].

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2-(2-{[2-(4-Pyridylcarbon-yl)hydrazinyl-idene]meth-yl}phen-oxy)acetic acid.

Project description:In the title compound, C(15)H(13)N(3)O(4), the pyridine and benzene rings are nearly perpendicular [dihedral angle = 84.24?(5)°]. In the crystal structure, classical O-H?N hydrogen bonding between the OH group of the carboxyl unit and a neighbouring pyridine ring N atom and N-H?O hydrogen bonding between the imine NH group and a neighbouring O atom of an acyl unit, together with complementary non-classical C-H?O hydrogen bonds between carboxyl O atoms and neighbouring CH groups, link the mol-ecules into a three-dimensional system.

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1-Chloro-1-[(4-meth-oxy-phen-yl)hydrazinyl-idene]propan-2-one.

Project description:The non-H atoms of the title compound, C(10)H(11)ClN(2)O(2), lie nearly on a plane (r.m.s. deviation = 0.150?Å), and the C=N double bond has a Z configuration. In the crystal, adjacent mol-ecules are linked by an N-H?O(carbon-yl) hydrogen bond, forming a chain running along [201].

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(Z)-Ethyl 2-benzyl-idene-3-oxobutano-ate.

Project description:The title mol-ecule, C(13)H(14)O(3), adopts a Z conformation about the C=C double bond. In the crystal, weak inter-molecular C-H?O hydrogen bonds with phenyl -CH atoms functioning as donors and the carbonyl O atom of an ester group as acceptor are observed.

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1,5-Bis[1-(4-meth-oxy-phen-yl)ethyl-idene]thio-carbonohydrazide.

Project description:In the title mol-ecule, C(19)H(22)N(4)O(2)S, the two benzene rings form a dihedral angle of 9.16?(13)°. In the crystal, pairs of weak inter-molecular C-H?S hydrogen bonds link the mol-ecules into centrosymmetric dimers, which are further linked through weak C-H?O inter-actions into sheets parallel to (012).

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(E)-1-(2,4-Dinitro-phen-yl)-2-[1-(3-meth-oxy-phen-yl)ethyl-idene]hydrazine.

Project description:There are two crystallographically independent mol-ecules in the asymmetric unit of the title compound, C(15)H(14)N(4)O(5), with different conformations for the meth-oxy groups. The mol-ecules are both slightly twisted, the dihedral angles between two benzene rings being 8.37 (18)° in one and 7.31 (18)° in the other. In both mol-ecules, the two nitro groups are essentially coplanar with their bound benzene ring, with the r.m.s. deviation of the dinitro-benzene plane being 0.0310 (3) Å in one mol-ecule and 0.0650 (3) Å in the other. In each mol-ecule, an intra-molecular N-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked by weak C-H⋯O inter-actions and stacked along the a axis through π-π inter-actions, with centroid-centroid distances of 3.651 (2) and 3.721 (2) Å. The crystal studied was a non-merohedral twin with a refined minor component of 20.1 (3)%.

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(E)-1-(2,4-Dinitro-phen-yl)-2-[1-(2-meth-oxy-phen-yl)ethyl-idene]hydrazine.

Project description:The mol-ecule of the title compound, C(15)H(14)N(4)O(5), is in an E conformation with respect to the C=N double bond and the dihedral angle between the two benzene rings is 37.83 (7)°. The ethyl-idenehydrazine plane makes dihedral angles of 4.93 (9) and 42.38 (9)° with the two benzene rings. An intra-molecular N-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked by weak C-H⋯O inter-actions into chains along the c axis which are stacked along the b axis by aromatic π-π inter-actions with a centroid-centroid distance of 3.5927 (10) Å.

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