Acta Crystallographica Section C

Crystal Structure Communications

Volume 69, Part 12 (December 2013)

metal-organic compounds

Acta Cryst. (2013). C69, 1503-1508    [ doi:10.1107/S0108270113031806 ]

Novel three-dimensional coordination polymers of lanthanides with sulfate and oxydi­acetic acid

T. K. Prasad and M. V. Rajasekharan

Abstract: Three three-dimensional coordination polymers, viz. poly[[diaqua-[mu]4-oxydi­acetato-di-[mu]4-sulfato-dipraseodymium(III)] hemihydrate], [Pr2(C4H4O5)(SO4)2(H2O)2]·0.5H2O, (I), poly[[di­aquadi-[mu]3-oxydi­acetato-[mu]3-sulfato-dineodymium(III)] 1.32-hydrate], [Nd2(C4H4O5)2(SO4)(H2O)2]·1.32H2O, (II), and poly[[di­aquadi-[mu]3-oxydi­acetato-[mu]3-sulfato-disamarium(III)] 1.32-hydrate], [Sm2(C4H4O5)2(SO4)(H2O)2]·1.32H2O, (III), were obtained by hydro­thermal reactions of the respective lanthanide oxides and ZnSO4 with oxydi­acetic acid (odaH2). The Nd3+ and Sm3+ compounds form isomorphous crystal structures in which the lanthanide cations are nine-coordinate, having a tricapped trigonal prismatic coordination. The Pr3+ compound has an entirely different crystal structure in which two types of coordination polyhedra are observed, viz. nine-coordinate (trigonal prism) and ten-coordinate (bicapped square anti­prism). The sulfate anions show various coordination modes, one of which has only rarely been observed crystallographically to date.

CCDC references: 930447, 930448 and 930449

Formula: [Pr2(C4H4O5)(SO4)2(H2O)2]·0.5H2O, and Nd and Sm analogues

Keywords: crystal structure; three-dimensional coordination polymers; lanthanide structures; lanthanide sulfates.

hkldisplay filedownload file

Structure factor file (CIF format) (149.9 kbytes)
[ doi:10.1107/S0108270113031806/fn3156Isup2.hkl ]
Contains datablock I

hkldisplay filedownload file

Structure factor file (CIF format) (203.1 kbytes)
[ doi:10.1107/S0108270113031806/fn3156IIsup3.hkl ]
Contains datablock II

hkldisplay filedownload file

Structure factor file (CIF format) (200.6 kbytes)
[ doi:10.1107/S0108270113031806/fn3156IIIsup4.hkl ]
Contains datablock III


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