Structure of bis(salicylato)-di(nicotinamide)copper(II)

Nam Nhat Hoang, Fedor Valach and Milan Melník


Dark violet crystals of Cu(C6H4OHCOO)2(NC5H4CONH2)2 crystallize in the orthorhombic system, group Pbca (No. 61), with unit cell parameters a = 14.625(7), b = 9.572(5), c = 18.671(9) Å, V = 2613.76 Å3, Z = 4. The structure was solved using direct methods, and refined by the least-squares method. Final R = 0.055 for 1361 independent reflexions. The coordination polyhedron around Cu(II) is a highly deformed octahedron, formed by four carboxylate oxygen atoms from two salicylate ligands [Cu–O bond lengths are 1.935(6) (2 ×) and 2.609(6) Å (2 ×)] and two nitrogen atoms from two nicotinamides [Cu–N bond lengths: 1.994(7) Å (2 ×)]. Molecular structural units in the crystal are interlinked by hydrogen bonds of nitrogen and oxygen atoms of nicotinamides.

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Zeitschrift für Kristallographie – Crystalline Materials offers a place for researchers to present results of their crystallographic studies. The journal includes theoretical as well as experimental research. It publishes Original Papers, Letters and Review Articles in manifold areas of crystallography.