Dipotassium di-mu-isothiocyanato-kappa4-N:S-bis[(N-salicylidene-DL- valinato-kappa3-O,N,O')cuprate(II)]

• Autoři: VANČO J.; ŠVAJLENOVÁ O.; MAREK Jaromír
• Rok publikování: 2003
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: Acta Crystallographica Section C: Crystal Structure
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• Obor: Anorganická chemie
• Klíčová slova: Schiff base; structure
• Popis: 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 (-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 (-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) Ĺ. 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 pi-pi interactions between neighbouring units.

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