ISSN:
1600-5759
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The title compound, [La2(C3H2O4)3(H2O)4]·H2O, forms a layer-type polymeric structure. The layers, which contain infinite puckered four-membered La—O—La—O rings in a pseudo-ternary symmetry, are formed by the lanthanum and one independent malonate group. They are interconnected by the second independent malonate group, giving a three-dimensional framework in which wide channels accommodate one disordered water molecule of crystallization. The La atom lies on a twofold axis and is ten-coordinated by eight O atoms from carboxylate groups and two water molecules. One malonate group is monodentate and triply bridging chelating, whilst the other is doubly monodentate. The extensive network of hydrogen bonds and bridge bonds observed in this structure enhances the structural stability. Despite some identical subfeatures, this structure is quite different from that observed in [La2(C3H2O4)3(H2O)3]·2H2O.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108270199016182
