Volume 59, Issue 5 pp. m190-m192

Dipotassium di-μ-iso­thio­cyanato-κ4N:S-bis­[(N-salicyl­idene-dl-valinato-κ3O,N,O′)­cuprate(II)]

First published: 15 June 2004
Citations: 1
Jaromír Marek, e-mail: [email protected]

Abstract

The title compound, K2[Cu2(NCS)2(C12H13NO3)2], consists of two K+ cations and (N-salicyl­idene-d-valinato)­cop­per(II) and (N-salicyl­idene-l-valinato)cop­per(II) coordination units con­nected through three-atom thio­cyanate (μ-NCS) bridges into a centrosymmetric dianion. The CuII atom adopts a square-pyramidal coordination, with three donor atoms of the tridentate Schiff base and one N atom of the bridging ligand (μ-NCS) in the basal plane. The axial position is occupied by the thio­cyanate S atom of a symmetry-related ligand at an apical distance of 2.9332 (10) Å. Coulombic interactions between six-coordinated K+ ions and the heteroatoms of neighbouring dimeric anions leads to the formation of one-dimensional chains of mol­ecules parallel to [010]. The superposition of the normals of the pyramidal base planes in a direction close to [001] indicates possible π–π interactions between neighbouring units.

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