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Crystal structure of 1-((1E)-{(E)-2-[(2-hydroxy-naphthalen-1-yl)methyl-idene]hydrazin-1-yl-idene}meth-yl)naphthalen-2-ol.

ABSTRACT: The complete mol-ecule of the title compound, C22H16N2O2, is generated by a crystallographic inversion centre at the mid-point of the central N-N bond. Two intra-molecular O-H?N hydrogen bonds occur.

SUBMITTER: Vijayan P

PROVIDER: S-EPMC4459329 | biostudies-literature | 2015 Jun

REPOSITORIES: biostudies-literature

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Crystal structure of 1-((1E)-{(E)-2-[(2-hydroxy-naphthalen-1-yl)methyl-idene]hydrazin-1-yl-idene}meth-yl)naphthalen-2-ol.

Vijayan Paranthaman P Viswanathamurthi Periasamy P Fleck Michel M Paramasivam Sugumar S Nanjappagounder Ponnuswamy Mondikalipudur PM

Acta crystallographica. Section E, Crystallographic communications 20150528 Pt 6

The complete mol-ecule of the title compound, C22H16N2O2, is generated by a crystallographic inversion centre at the mid-point of the central N-N bond. Two intra-molecular O-H⋯N hydrogen bonds occur. ...[more]

PMID: 26090207

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Crystal structure of 2-((1E)-{2-[bis-(2-methyl-benzyl-sulfan-yl)methyl-idene]hydrazin-1-yl-idene}meth-yl)-6-meth-oxy-phenol.

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N'-[(1E)-(2-Hy-droxy-naphthalen-1-yl)methyl-idene]-2-meth-oxy-benzohydrazide.

Project description:There are three independent mol-ecules in the asymmetric unit of the title compound, C(19)H(16)N(2)O(3), in which the dihedral angles between the naphthalene ring system and the benzene ring are 7.52?(16), 18.15?(18), and 13.9?(2)°. All the mol-ecules exist in the trans configuration with respect to the methyl-idene units. In each mol-ecule there is one O-H?N and one N-H?O intra-molecular hydrogen bond. In the crystal, two of the mol-ecules are linked via a bifurcated N-H?(O,O) hydrogen bond. All three mol-ecules are further linked via C-H?O inter-actions.

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Methyl 2-((2Z,5Z)-4-oxo-3-phenyl-2-{2-[(1E)-1,2,3,4-tetra-hydro-naphthalen-1-yl-idene]hydrazin-1-yl-idene}-1,3-thia-zolidin-5-yl-idene)acetate.

Project description:In the title compound, C22H19N3O3S, the six-membered ring of the 1,2,3,4-tetra-hydro-naphthalene ring system adopts an envelope conformation with the central CH2 C atom as the flap. The mol-ecular conformation is stabilized by an S⋯O contact, forming a pseudo-five-membered ring. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds into chains propagating along [102].

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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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Project description:In the title compound, C(23)H(25)NO, an intra-molecular O-H?N hydrogen bond defines the mol-ecular conformation; the naphthol mean plane and the benzene ring form a dihedral angle of 75.8?(2)°. The piperidine ring adopts a chair conformation. The crystal packing exhibits no short inter-molecular contacts.

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2-{(1E)-[(E)-2-(2,6-Di-chloro-benzyl-idene)hydrazin-1-yl-idene]meth-yl}phenol: crystal structure, Hirshfeld surface analysis and computational study.

Project description:The title Schiff base compound, C14H10Cl2N2O, features an E configuration about each of the C=N imine bonds. Overall, the mol-ecule is approximately planar with the dihedral angle between the central C2N2 residue (r.m.s. deviation = 0.0371?Å) and the peripheral hy-droxy-benzene and chloro-benzene rings being 4.9?(3) and 7.5?(3)°, respectively. Nevertheless, a small twist is evident about the central N-N bond [the C-N-N-C torsion angle = -172.7?(2)°]. An intra-molecular hy-droxy-O-H?N(imine) hydrogen bond closes an S(6) loop. In the crystal, ?-? stacking inter-actions between hy-droxy- and chloro-benzene rings [inter-centroid separation = 3.6939?(13)?Å] lead to a helical supra-molecular chain propagating along the b-axis direction; the chains pack without directional inter-actions between them. The calculated Hirshfeld surfaces point to the importance of H?H and Cl?H/H?Cl contacts to the overall surface, each contributing approximately 29% of all contacts. However, of these only Cl?H contacts occur at separations less than the sum of the van der Waals radii. The aforementioned ?-? stacking inter-actions contribute 12.0% to the overall surface contacts. The calculation of the inter-action energies in the crystal indicates significant contributions from the dispersion term.

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