Research Article: catena-Poly[copper(II)-{μ3-4,4′-dichloro-2,2′-[butane-1,4-diylbis(nitrilo­methanyl­yl­idene)]diphenolato-κ4N,O:N′,O′:O′}]

Date Published: April 01, 2011

Publisher: International Union of Crystallography

Author(s): Hadi Kargar, Reza Kia.


The asymmetric unit of the title coordination polymer, [Cu(C18H16Cl2N2O2)]n, consists of a Schiff base complex in which the CuII atom adopts a square-pyramidal coordination geometry, being coordinated by two N and two O atoms of symmetry-related ligands and by a third O atom from a complex related by an inversion center. In the structure, a crystallographic twofold rotation axis bis­ects the central C—C bonds of the n-butyl spacers of the designated Schiff base ligands, making symmetry-related dimeric units, which are twisted around CuII atoms in a bis-bidentate coordination mode. In the crystal, these dimeric units are connected through the third bridging Cu—O bonds [2.3951 (13) Å], forming one-dimensional coordination polymers, which propagate along [001]. Furthermore, inter­molecular π–π inter­actions [centroid–centroid distance = 3.811 (1) Å] stabilize the crystal packing.

Partial Text

For van der Waals radii, see: Bondi (1964 ▶). For background to coordination polymers, see: Kido & Okamoto (2002 ▶); Li et al. (2006 ▶); Eddaoudi et al. (2001 ▶); Dietzel et al. (2005 ▶). For background to bis-bidentate Schiff base complexes, see: Hannon et al. (1999 ▶); Lavalette et al. (2003 ▶). For the synthesis and structural variations of Schiff base complexes, see: Granovski et al. (1993 ▶); Elmali et al. (2000 ▶).




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