Abstract

Abstract The crystal structure of bis(pyridine-2-acetamide)copper(II) perchlorate, Cu(paaH)2(ClO4)2, was determined from three-dimensional X-ray photographic data and refined by block-diagonal least-squares methods, using 1698 independent reflections to give R=0.12. The crystals are monoclinic with a space group of C2/c. There are four formula units in a unit cell with dimensions of: a=10.957, b=12.178, c=15.566 Å, and β=108.7°. The complex is centrosymmetric and square-planar, with two ligand molecules coordinating to the copper atom in trans positions through the amide-oxygen and the ring-nitrogen atoms. Two perchlorate ions coordinate weakly to the central copper atom through one of the four oxygen atoms from the top and bottom of the plane containing copper, amide-oxygen, and ring-nitrogen atoms.

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