Publication

Back to overview

Crystal structures of a copper(II) and the isotypic nickel(II) and palladium(II) complexes of the ligand ( E )-1-[(2,4,6-tribromophenyl)diazenyl]naphthalen-2-ol

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Chetioui Souheyla, Rouag Djamil-Azzeddine, Djukic Jean-Pierre, Bochet Christian G., Touzani Rachid, Bailly Corinne, Crochet Aurélien, Fromm Katharina M.,
Project Photons in organic synthesis
Show all

Original article (peer-reviewed)

Journal Acta Crystallographica Section E Crystallographic Communications
Volume (Issue) 72(8)
Page(s) 1093 - 1098
Title of proceedings Acta Crystallographica Section E Crystallographic Communications
DOI 10.1107/s205698901601080x

Open Access

URL http://doi.org/10.1107/S205698901601080X
Type of Open Access Publisher (Gold Open Access)

Abstract

In the copper(II) complex, bis{( E )-1-[(2,4,6-tribromophenyl)diazenyl]naphthalen-2-olato}copper(II), [Cu(C 16 H 8 Br 3 N 2 O) 2 ], (I), the metal cation is coordinated by two N atoms and two O atoms from two bidentate ( E )-1-[(2,4,6-tribromophenyl)diazenyl]naphthalen-2-olate ligands, forming a slightly distorted square-planar environment. In one of the ligands, the tribromobenzene ring is inclined to the naphthalene ring system by 37.4 (5)°, creating a weak intramolecular Cu...Br interaction [3.134 (2) Å], while in the other ligand, the tribromobenzene ring is inclined to the naphthalene ring system by 72.1 (6)°. In the isotypic nickel(II) and palladium(II) complexes, namely bis{( E )-1-[(2,4,6-tribromophenyl)diazenyl]naphthalen-2-olato}nickel(II), [Ni(C 16 H 8 Br 3 N 2 O) 2 ], (II), and bis{( E )-1-[(2,4,6-tribromophenyl)diazenyl]naphthalen-2-olato}palladium(II), [Pd(C 16 H 8 Br 3 N 2 O) 2 ], (III), respectively, the metal atoms are located on centres of inversion, hence the metal coordination spheres have perfect square-planar geometries. The tribromobenzene rings are inclined to the naphthalene ring systems by 80.79 (18)° in (II) and by 80.8 (3)° in (III). In the crystal of (I), molecules are linked by C—H...Br hydrogen bonds, forming chains along [010]. The chains are linked by C—H...π interactions, forming sheets parallel to (011). In the crystals of (II) and (III), molecules are linked by C—H...π interactions, forming slabs parallel to (10-1). For the copper(II) complex (I), a region of disordered electron density was corrected for using the SQUEEZE routine in PLATON [Spek (2015). Acta Cryst. C 71 , 9–18]. The formula mass and unit-cell characteristics of the disordered solvent molecules were not taken into account during refinement.
-