Synthesis and Crystal Structure of a Novel Compound: [Nd3(OH)7(O2CC6H4SO3)(H2O]n•nH2O with a Pillar-layered Structure

A novel Nd(III) compound, [Nd-3(OH)(7)(O2CC6H4SO3)(H2O)](n)center dot nH(2)O 1, has been synthesized by the hydrothermal reaction of Nd2O3 and 3-sulfobenzoic acid monosodium salt. It was characterized by IR spectroscopy, elemental analysis, thermogravimetric analysis and single-crystal X-ray diffraction. It crystallizes in monoclinic, space group P(2)1/c with a = 13.024(3), b = 10.961(2), C = 12.792(3) angstrom, beta = 91.271(3)degrees, V = 1825.6(7) angstrom(3), Z = 4, M-r= 787.97, D-c = 2.867 g/cm(3), mu = 8.584 mm(-1), F(000) = 1460, S = 1.035, R = 0.0442 and wR = 0.1166 (I > 2 sigma(I)). In this compound, the cross-linkage of Nd atoms by bridging hydroxy groups results in a Nd-O inorganic < 200 > layer, and such layers are linked by the 3-O3S-C6H4-CO2 dianions into a pillar-layered structure. The lattice water molecules are located in the cavity.