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6902009 
Journal Article 
Poly[[aquatris(mu(4)-benzene-1,2-dicarboxylato)dilanthanum(III)] hemihydrate] 
Lush, SFu; Shen, FwuM; , 
2011 
Yes 
Acta Crystallographica. Section E: Structure Reports Online
ISSN: 1600-5368 
WILEY-BLACKWELL 
HOBOKEN 
M1370-U675 
22064614 
WOS:000295614800045 
The asymmetric unit of the title coordination polymer, {[La-2(C8H4O4)(3)(H2O)]center dot 0.5H(2)O}(n), contains two independent La-III atoms, one of which is surrounded by eight carboxylate-O atoms from six benzene-1,2-dicarboxylate (BDC) anions in a bicapped trigonal-prismatic geometry. The other La-III atom is nine-coordinated in a tricapped trigonal-prismatic geometry, formed by eight carboxylate-O atoms from six BDC anions and a coordinated water molecule. The BDC anions bridge the La-III atoms, forming a two-dimensional polymeric complex parallel to (001). The crystal structure contains weak O-H center dot center dot center dot O and non-classical C-H center dot center dot center dot O hydrogen bonds. A C-H center dot center dot center dot pi interaction is also present in the crystal structure. The uncoordinated water molecule shows half-occupation.