Rong-hua Zeng

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In the title complex, [Gd2(C9H4N2O4)2(C9H5N2O4)2(H2O)2]n, two of the benzimidazole-5,6-dicarboxylate ligands are protonated at the imidazole groups. Each Gd ion is coordinated by six O atoms and one N atom from five ligands and one water molecule, displaying a distorted bicapped trigonalprismatic geometry. The Gd ions are linked by the carboxylate groups(More)
In the title complex, [Nd(C5H3N2O2)(C2O4)(H2O)2]n, the Nd atom is ten-coordinated by one N atom and three O atoms from two pyrazine-2-carboxylate ligands, four O atoms from two oxalate ligands and two water molecules in a distorted bicapped square-antiprismatic geometry. The two crystallographically independent oxalate ligands, each lying on an inversion(More)
In the title coordination polymer, catena-poly[[[triaqua-europium(III)]-bis-(μ-1H,3H-benzimidazol-3-ium-5,6-dicarb-oxyl-ato-κ(3)O(5),O(5'):O(6))-[triaqua-europium(III)]-di-μ-sulfato-κ(3)O:O,O';κ(3)O,O':O'] hexahydrate], [Eu(2)(C(9)H(5)N(2)O(4))(2)(SO(4))(2)(H(2)O)(6)]·6H(2)O}(n), the 1H,3H-benzimidazol-3-ium-5,6-dicarb-oxy-l-ate ligand is protonated at the(More)
In the title complex, [Nd(C(5)H(3)N(2)O(2))(C(2)O(4))(H(2)O)(2)](n), the Nd(III) atom is ten-coordinated by one N atom and three O atoms from two pyrazine-2-carboxyl-ate ligands, four O atoms from two oxalate ligands and two water mol-ecules in a distorted bicapped square-anti-prismatic geometry. The two crystallographically independent oxalate ligands,(More)
In the title complex, [Dy(C7H3NO4)(C7H4NO4)]n, one of the ligands is fully deprotonated while the second has lost only one H atom. Each Dy ion is coordinated by six O atoms and two N atoms from two pyridine-2,6-dicarboxylate and two 6carboxypicolinate ligands, displaying a bicapped trigonalprismatic geometry. The average Dy—O bond distance is 2.40 Å, some(More)
In the title complex, {[Tb(C(6)H(5)NO(2))(3)(H(2)O)(2)](ClO(4))(3)·H(2)O}(n), the Tb(III) ion is coordinated by six O atoms from six isonicotinate (inic) ligands and two water mol-ecules, displaying a bicapped trigonal-prismatic geometry. The inic ligands, which are protonated at the pyridine N atom, link the metal centres, forming a polymeric chain running(More)
In the title complex, [Nd(C(10)H(13)N(2)O(8))(H(2)O)](n), each Nd(III) ion is coordinated by six O atoms and two N atoms from one N'-(carboxymethyl)ethylene-diamine--N,N,N'-triacetate (edta) ligand and one water mol-ecule, displaying a bicapped trigonal-prismatic geometry. The edta ligands link the neodymium metal centres, forming polymeric chains running(More)
In the title compound, [Fe(C(8)H(5)Cl(2)O(3))(2)(H(2)O)(2)](n), the Fe(II) atom is located on an inversion center. It is coordinated by four O atoms from four 2,4-dichloro-phenoxy-acetate ligands and two water mol-ecules, displaying a distorted octa-hedral geometry. The carboxyl-ate groups of the 2,4-dichloro-phenoxy-acetate ligands link the Fe atoms,(More)
The asymmetric unit of the title compound, C(8)H(8)O(4)·H(2)O, contains two organic mol-ecules which are connected by the two water mol-ecules through O-H⋯O hydrogen bonds, forming an R(4) (4)(12) ring. Further O-H⋯O hydrogen bonds assemble these rings through R(6) (6)(18) rings, giving rise to infinite helical chains arranged around the b axis. These(More)
The title complex, [Pr(2)(C(4)H(2)O(4))(3)(C(4)H(4)O(4))(H(2)O)(2)](n), was synthesized by reaction of praseodymium(III) nitrate hexa-hydrate with fumaric acid in a water-ethanol (4:1) solution. The asymmetric unit comprises a Pr(3+) cation, one and a half fumarate dianions (L(2-)), one half-mol-ecule of fumaric acid (H(2)L) and one coordinated water(More)