MIXED-LIGAND FLUOROOXALATE COMPLEX COMPOUNDS OF INDIUM(III) M2[InF3(C2O4)H2O] (M = K, Rb): SYNTHESIS AND CRYSTAL STRUCTURE
R. L. Davidovich1, V. B. Logvinova1, V. V. Tkachev2, G. V. Shilov2
1Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia
2Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
Keywords: индий(III), смешанные лиганды, оксалатофторидное комплексное соединение, синтез, полимерная цепь, кристаллическая структура, indium(III), mixed-ligand, fluorooxalate complex compound, synthesis, polymer chain, crystal structure
Abstract
Isostructural fluorooxalate complex compounds of indium(III) M2[InF3(C2O4)H2O] (M = K, Rb), being the first representatives of a new class of mixed-ligand fluoro-containing complex compounds of indium(III) are synthesized for the first time and structurally studied. The crystal structures of M2[InF3(C2O4)H2O] (M = K, Rb) are formed of K+ cations (Rb+ respectively) and complex [InF3(C2O4)H2O]2- anions. The indium atom in the complex anion is surrounded by four F atoms, two of which are bridging, the oxygen atom of the coordinated H2O molecule, and two oxygen atoms of the bis-bidentate (tetradentate) oxalate group. The coordination polyhedron of the indium atom (CN 7) is a pentagonal bipyramid. Via alternating double bridging F atoms and tetradentate bridging C2O4 group, the In(III) atom polyhedra are arranged in polymer chains. Via hydrogen O-H⋯F bonds the chains are organized in layers. Between the layers, the K+ or Rb+ cations are located, which strengthen the crystal structure.
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