Abstract
Three new complexes from the family of 3d-metal fluorocarboxylatometallates are synthesized and studied. Isotypical complex compounds K[Co3(μ3-F)(CF3COO)6(CH3COOH)3](CH3COOH) (I) and K[M3(μ3-F)(CF3COO)6(CH3COOH)3](CH3COOH)0 6(CF3COOH)_(0.4) (II) are analogs of potassium fluo-rotrifluoroacetatometallates(II) in which axial ligands are replaced by acetic acid molecules. Complex NH4[Ni3(μ3-F)(CH3COO)6(CH3COOH)3](CH3COOH)6 (III) is the first example of fluorocarboxylate with acetate bridging ligands. The presence of acetic acid in the system results in an increase in the coordination number of alkaline metal and (due to the formation of a developed system of hydrogen bonds) in an increase in the dimensionality of the structure from the chain one in the earlier studied analogs to the layered structure. The structure of the complex fluorocarboxylate anion in compound III resembles those of fluoro-trifluoroacetate analogs I and II, the character of interaction of the complex anion with the single-charge cation is retained, and the structure exists in the form of corrugated layers formed by chains linked via hydrogen bonds with the solvate molecules of acetic acid (CIF files CCDC nos. 2124887 (I), 2124888 (II), and 2127163 (III)).
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