The Synthesis and Crystal and Molecular Structures of [Pentaaquabis(1-hydroxy-2-naphthoato)neodymium(III)] (1-Hydroxy-2-naphthoate) Dihydrate, [Nd{C10H6(OH)CO2}2(H2O)5][C10H6(OH)CO2]·2H2O

The title complex was synthesized, and its crystal and molecular structures were determined by the single-crystal X-ray-diffraction method. It is triclinic, with the space group of P\bar1; the cell constants are a=20.621(4), b=22.288(5), c=7.724(1) A, α=93.30(2), β=96.78(2), γ=107.43(2)°, Z=4, and the final R value is 0.048. Although there are two kinds of crystallographically independent complexes, their structures are almost the same, with only a slight difference in the orientations of the naphthalene rings of the ligands. Both of the central metal atoms are ennea-coordinated and are in the tricapped trigonal-prism geometry: two carboxylato ligands make four-membered chelate rings, and they are also ligated five water oxygen atoms. No carboxylate ions bridge the metal atoms, but the oxygen atoms of the ligands, isolated carboxylate ions, and the crystalline water molecules are linked through hydrogen bondings along the bc-plane. The metal atoms lie on a plane parallel to (100), and the planes are separ...