Abstract
The title compound, [CuCl2(C12H12N2)] n , was obtained via a DMSO-mediated dehydration of Cu(4,4'-dimethyl-2,2'-bi-pyridine)-copper(II)·0.25H2O. The central Cu(II) atom is coordinated in a distorted trigonal-bipyramidal geometry by two N atoms of a chelating 4,4'-dimethyl-2,2'-bi-pyridine ligand [average Cu-N = 2.03 (3) Å] and three Cl atoms, one terminal with a short Cu-Cl bond of 2.2506 (10) Å, and two symmetry-equivalent and bridging bonds. The bridging Cl atom links the Cu(II) ions into chains parallel to [001] via one medium and one long Cu-Cl bond [2.3320 (10) and 2.5623 (9) Å]. The structure displays both inter- and intra-molecular C-H⋯Cl hydrogen bonding.
Highlights
Naval Research Laboratory, 4555 Overlook Ave, Washington, DC 20375, USA. *Correspondence e-mail: Edited by M
The reaction of dimethyl-2,20 -bipyridine with CuI and/or CuII in DMSO or water led to the isolation of 10 different crystalline materials, suggesting that a large number of structural motifs are possible including five-coordinate monomers, distorted tetrahedral monomers, stacked planar monomers, stacked planar bibridged dimers and and five-coordinate bibridged dimers (Willett et al, 2001)
In this paper we describe the synthesis and structural characterization of a previously unknown form of dichlorido(4,40 -dimethyl-2,20 -bipyridine)copper(II) via a DMSO-mediated dehydration of Cu(4,40 -dimethyl-2,20 -bipyridine)Cl20.25H2O
Summary
Br) have been used in a number of important applications in recent years, most notably in the areas of catalysis for organic synthesis (Ricardo et al, 2008; Csonka et al, 2008; Thorpe et al, 2012), DNA cleavage (Jaividhya et al, 2012), degradation of pesticides (Knight et al, 2014) and water oxidation (Barnett et al, 2012). Such complexes are characterized by an extensive number of metal coordination geometries including square-planar/tetrahedral, square-pyramidal/trigonal–bipyramidal and distorted octahedral.
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