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Título

Synthesis, characterization and crystal structure of the new pentahydrate of bis(2,2'-bipyridine-κ2 N,N')(oxalato-κ2O,O2)nickel(II)

AutorFarkašová, Nela; Černák, Juraj; Tomás, Milagros ; Falvello, Larry R.
Palabras claveCrystal structure
π–π interactions
Pentahydrate
Hydrogen bonding
TGA/DTA analysis
bis(2,2′-bipyridine)(oxalato)nickel(II)
IR spectra
Fecha de publicación2014
EditorInternational Union of Crystallography
John Wiley & Sons
CitaciónActa Crystallographica Section C: Structural Chemistry 70(5): 477-481 (2014)
ResumenThe reaction of NiCl2, K2C2O4 H2O and 2,2'-bipyridine (bpy) in water-ethanol solution at 281K yields light-purple needles of the new pentahydrate of bis(2,2'-bipyridine) oxalatonickel(II), [Ni(C2O4)(C10H 8N2)2] 5H2O or [Ni(ox)(bpy)2] 5H2O, while at room temperature, deep-pink prisms of the previously reported tetrahydrate [Ni(ox)(bpy)2] 4H2O [Román, Luque, Guzmán-Miralles & Beitia (1995), Polyhedron, 14, 2863-2869] were gathered. The asymmetric unit in the crystal structure of the new pentahydrate incorporates the discrete molecular complex [Ni(ox)(bpy)2] and five solvent water molecules. Within the complex molecule, all three ligands are bonded as chelates. The complex molecules are involved in an extended system of hydrogen bonds with the solvent water molecules. Additionally, π-π interactions also contribute to the stabilization of the extended structure. The dehydration of the pentahydrate starts at 323K and proceeds in at least two steps as determined by thermal analysis. © 2014 International Union of Crystallography.
Versión del editorhttp://dx.doi.org/10.1107/S2053229614007499
URIhttp://hdl.handle.net/10261/111580
DOI10.1107/S2053229614007499
Identificadoresdoi: 10.1107/S2053229614007499
e-issn: 2053-2296
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