Artículo
Crystallographic new light on an old complex: NaMg[Cr(oxalato) 3]·9H 2O and structure redetermination of the isomorphous aluminum(III) compound
Piro, Oscar Enrique
; Echeverría, Gustavo Alberto
; Gonzalez Baro, Ana Cecilia
; Baran, Enrique José




Fecha de publicación:
11/2015
Editorial:
Taylor & Francis
Revista:
Journal of Coordination Chemistry
ISSN:
0095-8972
e-ISSN:
1029-0389
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The crystal structure of sodium and magnesium tris(oxalato)chromato(III) nona hydrate, NaMg[Cr(C2O4)3]·9H2O, has been determined by X-ray diffraction methods. It crystallizes in the trigonal P3c1 space group with (in the hexagonal setting) a = b = 16.9635(4), c = 12.5247(3) Å, and Z = 6 molecules per unit cell. The Cr(III) and sodium ions are in octahedral environments coordinated to three oxalate molecules and arranged in a honeycomb-like layered structure perpendicular to the crystal c-axis. There are three different octahedral [Mg(H2O)6]2+ hydrated ions that fill the honeycomb holes giving rise to electrically neutral Na[Mg(H2O)6][Cr(oxalato)3] crystal slabs. Neighboring slabs are bridged by the remaining three water molecules through H-bonds and therefore the whole crystal can be more properly described as Na[Mg(H2O)6][Cr(oxalato)3]·3H2O. Also, the structure of isomorphous NaMg[Al(C2O4)3]·9H2O compound has been re-examined and compared with the chromium(III) complex. Infrared and Raman spectra of both complexes were also recorded and briefly discussed.
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Articulos(IFLP) [1400]
Articulos de INST.DE FISICA LA PLATA
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Citación
Piro, Oscar Enrique; Echeverría, Gustavo Alberto; Gonzalez Baro, Ana Cecilia; Baran, Enrique José; Crystallographic new light on an old complex: NaMg[Cr(oxalato) 3]·9H 2O and structure redetermination of the isomorphous aluminum(III) compound; Taylor & Francis; Journal of Coordination Chemistry; 68; 21; 11-2015; 3776-3787
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