Synthesis and structure of bis(1,2-diaminoethane) copper(II) bis(o-hydroxybenzoate) monohydrate and trans-diaquabis(1,2-diaminoethane)copper(II) bis(o-aminobenzoate) |
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| Authors: | K. É. Miminoshvili A. N. Sobolev É. B. Miminoshvili L. A. Beridze É. R. Kutelia |
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| Affiliation: | (1) Georgian Technical University, Tbilisi;(2) The University of Western Australia, Crawley;(3) Tbilisi State Medical University, Georgia |
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| Abstract: | X-ray structural analysis has been performed for two complex compounds: Cu(en)2(o-HB)2H2O (I) (a = 16.873(4) Å, b = 8.713(2) Å, c = 14.803(3) Å, β = 91.15(2)°, V = 2175.8(8) Å3, C2/c, Z = 4, R(F) = 0.0263, 1516 reflections with I > 3σ (I)) and [Cu(en)2(OH2)2]2+(o-AB?)2 (II) (a = 7.488(5) Å, b = 22.122(8) Å, c = 7.856(5) Å, β = 118.77(2)°, V = 1140.7(11) Å3, P21/n, Z = 2, R(F) = 0.0432, 1684 reflections with I > 3σ(I)) synthesized under identical conditions (en is ethylenediamine, o-HB is o-hydroxybenzoate, and o-AB is o-aminobenzoate). Although the compounds were assumed to have similar structures and the Cu-Lig bond lengths and the cis and trans angles are acceptable for an octahedral structure, the geometric parameters of o-HB suggest that the copper atom has a plane square environment. |
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| Keywords: | complex compounds synthesis structural analysis transition metals hydroxybenzoate aminobenzoate |
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