Research Article: 4,6-Dichloro-2-[(E)-(2-{[(E)-3,5-dichloro-2-oxidobenzyl­idene]aza­nium­yl}eth­yl)iminiumylmeth­yl]phenolate

Date Published: July 01, 2012

Publisher: International Union of Crystallography

Author(s): Reza Kia, Hadi Kargar, Amir Adabi Ardakani, Muhammad Nawaz Tahir.


The asymmetric unit of the title compound, C16H12Cl4N2O2, comprises half of a potentially tetra­dentate Schiff base ligand, located about a twofold rotation axis which bis­ects the central C—C bond of the ethane-1,2-diamine group. In the solid state, the compound exists in the zwitterionic form. There are two intra­molecular N—H⋯O hydrogen bonds making S(6) ring motifs. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds, forming two-dimensional frameworks which lie parallel to (100). There are also short Cl⋯Cl [3.4395 (9) Å] contacts present.

Partial Text

For standard bond lengths, see: Allen et al. (1987 ▶). For hydrogen-bond motifs, see: Bernstein et al. (1995 ▶). For van der Waals radii, see: Bondi (1964 ▶). For related Schiff base ligands, see: Kargar et al. (2011 ▶); Kia et al. (2010 ▶).




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