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Zeitschrift für Kristallographie - Crystalline Materials

Editor-in-Chief: Pöttgen, Rainer

Ed. by Antipov, Evgeny / Boldyreva, Elena V. / Friese, Karen / Huppertz, Hubert / Jahn, Sandro / Tiekink, E. R. T.

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Volume 209, Issue 12

Issues

Crystal structures of nickel(II) and copper(Il)-Schiff-bases complexes with tetramic and tetronic acid subunits

G. Reck / B. Schulz / A. Zschunke / O. Tietze / J. Haferkorn
Published Online: 2010-07-28 | DOI: https://doi.org/10.1524/zkri.1994.209.12.969

Abstract

N,N′-ethylene-bis-(tetronic-acid-3-formiminato)-copper(II)/K1 crystallizes in space group P21/n: C12H10CuN2O6 × H2O; a = 8.439(5) Å; b = 12.762(1) Å; c = 12.582(1) Å; β = 99.02(3)°; V = 1338.3 Å3; Z = 4; Dx = 1.783 gcm−3; MoKα = 0.71069 Å; μ = 16.71 cm−1; F(000) = 732; T = 293 K; Conventional R = 0.037; Rw = 0.040 for 1633 observed reflections.

N,N′-ethylene-bis-(tetronic-acid-3-formiminato)-nikkel(II)/K2 crystallizes in space group C2/c: C12H10N2O6Ni × 4 H2O; a = 20.232(5) Å; b = 12.983(5) Å; c = 14.038(10) Å; β = 120.01(3)°; V = 3193.0 Å3; Z = 8; Dx = 1.702 gcm−3; MoKα = 0.71069 Å; μ = 12.74 cm−1; F(000) = 1696; T = 293 K; Conventional R = 0.087; Rw = 0.090 for 2877 observed reflections.

N,N′-ethylene-bis-(1,5,5-trimethyltetramic-acid-3-formiminato)-copper(II)/K3 crystallizes in space group P21/n: C18H24N4O4Cu × 1 H2O; a = 15.981(9) Å; b = 7.293(8) Å; c = 18.742(4) Å; β = 114.06(4)°; V = 1994 Å3; Z = 4; Dx = 1.472 gcm−3; MoKα = 0.71069 Å; μ = 11.31 cm−1; F(000) = 924; T = 293 K; Conventional R = 0.129; Rw = 0.142 for 2900 observed reflections.

In K1 and K3 copper is coordinated by two nitrogen and two oxygen atoms of the ligand molecule as well as by one water molecule on top of a tetragonal pyramid. In K2 two water molecules are included in the complex formation. These and two nitrogen as well as two oxygen ligand atoms form a nearly regular octahedron.

About the article

Published Online: 2010-07-28

Published in Print: 1994-12-01


Citation Information: Zeitschrift für Kristallographie - Crystalline Materials, Volume 209, Issue 12, Pages 969–974, ISSN (Online) 2196-7105, ISSN (Print) 2194-4946, DOI: https://doi.org/10.1524/zkri.1994.209.12.969.

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