L. Sieron et M. Bukowskastrzyzewska, LORATOBIS(PYRIDINE-2-CARBOX-AMIDE-N-1,O)COPPER(II), Acta crystallographica. Section C, Crystal structure communications, 54, 1998, pp. 322-324
Crystals of the title compound, [Cu(ClO4)(2)(C6H6N2O)(2)], consist of
centrosymmetric complex molecules of [Cu(ClO4)2(paa)(2)] linked by hyd
rogen bonding (paa is picolinic acid amide or pyridine-2-carboxamide,
C6H6N2O), The paa ligands are coordinated through their ring Pa and am
ide O atoms to form the base of an elongated octahedron [Cu-N 1.967 (2
) and Cu-O 1.937 (2) Angstrom]. The axial Cu-O distance is 2,649 (3) A
ngstrom. The sparse structural literature on copper(ll)-pyrdine-2-carb
oxamide chelate complexes is discussed.