K. Smolander, Kirsti Leisto
Mar 15, 1990
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0
Influential Citations
9
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract The crystal and molecular structures of the linear trinuclear copper(II) complex with 2-diethylaminoethanol and fluoroacetic acid were determined by three-dimensional X-ray crystallography. Bis[μ-(2- diethylaminoethanolato-N,μ-O)]-bis[μ-fluoroacetato- O,O′]-bis(fluoroacetato)-bis(ethanol)tricopper(II) crystallizes in the triclinic space group P 1 with a = 7.963(6), b = 8.443(7), c = 13.553(6) A, α = 76.16(5), β = 81.82(5), γ = 87.62(6)°, Z = 1. The structure was solved by direct methods and refined to the R value 0.050 using 2738 independent reflections. Like the F(2) atom, some of the C atoms of the aminoethanolato ligands are disordered with one or more rotational orientations. The three Cu(II) ions are in linear arrangement bridged by one bidentate carboxylate O atom and one 2-diethylaminoethanolato O atom. The Cu(1) atom is in 4 + 1 and the Cu(2) atom in 4 + 2 environment, and the Cu(1)Cu(2) distance is 3.126(1) A. A 2-diethylaminoethanolato O atom, two fluoroacetate O atoms and an amino N atom form a distorted square-plane around the Cu(I) atom with Cu(1)O bonds of 1.903(4)–1.966(4) A and a Cu(1)N bond of 2.030(4) A; the apical site is occupied by an ethanolato O atom and the Cu(1) O(6) distance is 2.623(7) A. The square-plane of the central Cu(2), which lies on the inversion centre, consists of two 2-diethylaminoethanolato O atoms and two carboxylato O atoms with Cu(2)O bonds of 1.946(3) and 1.954(4) A, respectively. The apical sites are occupied by ethanolato O atoms with a Cu(2)O(6) distance of 2.525(5) A.