ISSN:
1600-5759
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The sodium salt of a complex anion formed between gadolinium(III) and three variously deprotonated chelidamic acid (4-hydroxypyridine-2,6-dicarboxylic acid) ligand moieties, assigned as Na5[Gd(C7H2NO5)2(C7H3NO5)]·16H2O, i.e. pentasodium (4-hydroxypyridine-2,6-dicarboxylate)bis(4-oxidopyridine-2,6-dicarboxylate)gadolinium(III) hexadecahydrate, forms as colourless monoclinic crystals upon vapour diffusion of ethanol into its aqueous solution. The ligand moieties, assigned as two trianionic and one dianionic chelidamate species, are all tridentate in the complex anion of tricapped trigonal prismatic donor-atom geometry. The geometry of the ligands and that of the primary coordination sphere is very similar to that of the analogous anionic tris(ligand)–rare earth complexes of the pyridine-2,6-dicarboxylate (dipicolinate) dianion.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108270199015632
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