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The crystal structure of the title compound, {[Cu(C 19 H 17 N 4 O 2 )]ClO 4 ·C 2 H 3 N}  n  , is reported and compared to similar structures in the literature. The compound crystallizes in the monoclinic space group P 2 1 . The unit cell contains one complex mol-ecule in addition to perchlorate as the counter-ion and solvent (aceto-nitrile). The crystal packing evinces extended chains whereby the carboxyl-ate moiety on the 6-carboxyl-ato-2-(pyridyl-meth-yl)bis-(pyridin-2-ylmeth-yl)amine ligand bridges between two different copper centers in adjacent mol-ecules. This packing arrangement for the title compound appears to be unique when compared to allied structures in the literature. The perchlorate anion showed signs of disorder and its oxygen atoms were modelled over two sets of partially occupied sites, the occupancy of which was competitively refined to 0.564 (12)/0.436 (12). The crystal studied was refined as a two-component inversion twin.

acta crystallographica. section e, crystallographic communications

Crystal structure of <i>catena</i>-poly[[(μ-6-{[bis(pyridin-2-ylmethyl)amino]methyl}pyridine-2-carboxylato)copper(II)] perchlorate acetonitrile monosolvate]

Crystal structure of catena-poly[[(μ-6-{[bis(pyridin-2-ylmethyl)amino]methyl}pyridine-2-carboxylato)copper(II)] perchlorate acetonitrile monosolvate]