The roles of N- and O-coordination in the crystal and molecular structures of uranyl complexes with anthranilic and pyrazinic acids
UNSPECIFIED. (1996) The roles of N- and O-coordination in the crystal and molecular structures of uranyl complexes with anthranilic and pyrazinic acids. Inorganica Chimica Acta, 248 (2). pp. 241-246. ISSN 0020-1693Full text not available from this repository.
Oxonium tris(2-aminobenzenecarboxylato) dioxouranium(VI) monohydrate crystals contain monomeric molecules composed of a UO2 group (U-O 1.755 Angstrom mean; 178.3 degrees) and six oxygen atoms in the equatorial plane (U-O mean 2.456 Angstrom) donated by three bidentate carboxylic groups of anthranilic acid molecules. The coordination polyhedron is thus a hexagonal bipyramid involving solely O-coordination. Monoaquobis(2-pyrazinecarboxylato) dioxouranium(VI) dihydrate complex molecules are monomeric. The UO2 group (U-O mean 1.770 Angstrom, 179.1 degrees) is surrounded in the equatorial plane by two oxygen atoms (U-O mean 2.318 Angstrom), two nitrogen atoms (U-N mean 2.583 Angstrom) donated by pyrazinic acid molecules, and one oxygen atom from a water molecule (U-O 2.405 Angstrom). The coordination polyhedron around the U atom is thus a pentagonal bipyramid and reflects the propensity for ring N atoms to coordinate with uranyl ions. In the crystal, molecules of both title compounds are held together by systems of hydrogen bonds.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||Inorganica Chimica Acta|
|Publisher:||ELSEVIER SCIENCE SA LAUSANNE|
|Date:||15 July 1996|
|Number of Pages:||6|
|Page Range:||pp. 241-246|
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