The cobalt(III) complexes with tridentate ethylenediamine-N,N"-diacetate ions (Edda2–) and additional ligands, namely, diethylenetriamine (Dien) or ethylenediamine (En) and cyanide ions, were synthesized. As follows from X-ray diffraction analysis of [Co(Edda)(Dien)]ClO4· H2O (monoclinic crystals with a = 9.243 (2) Å, b = 14.167 (4) Å, c = 13.046 (3) Å, β = 91.19 (2)°, Z = 4, space group P21/c), the secondary N atom of the Dien ligand occupies the trans-position relative to the N atom of the Edda2– ligand, which contains a free acetate group. Two fac-isomers of [Co(Edda)(En)(CN)] with the CN– ion in the cis- and trans-positions relative to the oxygen atom of the carboxyl group were isolated, and the structure of the trans-(O,CN)-[Co(Edda)(En)(CN)]· 2H2O was determined: monoclinic crystals with a = 9.136 (3) Å, b = 15.484 (3) Å, c = 10.564 (3) Å, β = 110.67 (5)°, Z = 4, space group P21/c.
Russian Journal of Coordination Chemistry – Springer Journals
Published: Oct 13, 2004
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