Guang-Di Yang

Hydrothermal synthesis and characterization of a copper(I) halide coordination polymer with isonicotinic acid (IN) ligand as a template possessing three-dimensional supramolecular network structure

Abstract The title compound [CuBr(IN)]n 1 was hydrothermally synthesized from a simple reaction of CuBr2–IN–KBr–NaOH–H2O. X-ray analysis revealed that it is a new example containing extended one-dimensional staircase chain in copper(I) halide family. Its structure can be better described as a three-dimensional supramolecular network assembled via a combination of coordinate–covalent bonds and intermolecular hydrogen bonds. Moreover, compound 1 was characterized by elemental analysis, IR spectrum and TGA analysis.

0D and 1D dimensional structures based on the combination of polyoxometalates, transition metal coordination complexes and organic amines

Five novel heteropolyanions have been synthesized and characterized by IR, UV-vis, XPS spectroscopy, XRD, and elemental analyses. Single-crystal X-ray diffraction analyses reveal that these five compounds represent novel examples of compounds based on the combination of polyoxometalates, transition metal coordination complexes and organic amines. Of which 1, 2 and 3 exhibit 0D structures of polyoxometalate supported transition metal coordination complexes, while 4 and 5 exhibit novel 1D structures constructed from polyoxometalates and transition metal coordination complexes.

Crystal structure of cyclopentadienylneodymium dichloride

Abstract The compound η 5 -C 5 H 5 NdCl 2 · 3THF was successfully prepared from NaC 5 H 5 and NdCl 3 in tetrahydrofuran (THF). Methods preventing disproportionation are discussed. X-ray diffraction data of the compound were collected at low temperature (about 210 K). Crystals belong to monoclinic space group P 2 1 / n with a 7.864(3), b 17.198(7), c 15.212(5) A, β = 94.46(3)°, Z = 4. 1791 reflections were considered observed. The structure was solved by heavy-atom methods. Least-squares refinement converged to a final value of R = 0.049.

Synthesis and characterization of a novel POM compound containing two different layers stacked alternately

A novel POM compound containing the first Sb bicapped Keggin anion {SiMo(12)O(40)Sb(2)} and two different layers constructed from these anions stacked alternately has already been hydrothermally synthesized.

Hydrothermal Syntheses and Structural Characterization of One-Dimensional [Cu4Br2I3(C12H8N2)2]n and Molecular Cu3Br3(C12H8N2)2

The hydrothermal reactions of CuBr2, CuX (X=Br, I), and phen (phen=1,10-phenanthroline, C12H8N2) have lead to the syntheses of two novel complexes of one-dimensional [Cu4Br2I3(phen)2]n1 and trinuclear discrete cluster Cu3Br3(phen)22. Both compounds were characterized by singe-crystal X-ray diffraction. Crystal data for 1. Monoclinic, space group P21/c with a=14.054(3) Å, b=13.700(3) Å, c=15.920(3) Å, β=114.16(3)°, Z=2; 2. Monoclinic, space group C2/c with a=10.040(2) Å, b=14.516(3) Å, c=16.319(3) Å, β=94.29(3)°, Z=6.

A two-dimensional framework of novel vanadium clusters bridged by [Ni(en)2]2+: K{V12IVV6VO42Cl[Ni(en)2]3}·8H2O

The hydrothermal reaction of V2O5, H2C2O4·2H2O, en, KOH and NiCl2·6H2O gives a new two-dimensional open-framework solid; the extended structure consists of a two-dimensional network formed by the interconnection of each [V18O42Cl] cage to four other neighboring units via six [Ni(en)2]2+ bridging groups.

Metal–oxo cluster-supported transition metal complexes: hydrothermal synthesis and characterization of [{M(phen)2}2(Mo8O26)] (M = Ni or Co)

Two new metal–oxo supported transition metal complexes, [{M(phen)2}2(Mo8O26) (M = Ni or Co; phen = 1,10-phenanthroline) are synthesized by a hydrothermal method and characterized by X-ray crystallography, showing that the octamolybdate possesses a novel unprecedented structure and that [M(phen)2]2+ units are covalently bonded to the [Mo8O26]4– cluster.

Hydrothermal synthesis and characterization of [Ni(phen)3]2[Mo8O26]·2H2O

Abstract The reaction of MoO3, H2MoO4 and Ni(Ac)2·6H2O with 1,10-phenanthroline by a hydrothermal method furnishes the discrete cluster [Ni(phen)3]2[Mo8O26]·2H2O (1). The structure of 1 is triclinic, space group P1, a=11.4965(10), b=11.6829(13), c=15.1518(15) A, α=83.032(8), β=71.557(7), γ=78.319(7)°, R=0.0433 for 7397 observed [I>2σ(I)] reflections. The crystallographically determined solid state structure of 1 shows that the cluster consists of two complex cations, one cluster anion [Mo8O26]4− and two water molecules of crystallization. Each nickel ion is coordinated by six nitrogen atoms from three phenanthroline ligands, forming a distorted octahedron, and the anion has a β-configuration formed by eight edge-sharing MoO6 octahedra. Compound 1 was characterized by means of elemental analysis, IR spectra and TGA analysis.

COORDINATION CHEMISTRY AND STRUCTURE CHARACTERIZATION OF C18H36O6N2EU2(NO3)6.H2O

Abstract The crystal structure of a cryptate complex of europium, C18H36O6N2Eu2(NO3)6·H2O, has been determined from three-dimensional single-crystal X-ray diffraction data collected on a computer-automated diffractometer. The compound crystallizes in the triclinic space group P l with unit cell dimensions a = 14.815(5), b = 8.828(2), c = 13.302(4) A, α = 91.57(2), β = 92.64(3), γ = 86.90(3)° and Z = 2. The structure was solved by a heavy atom method and refined by a blocked-matrix least-squares procedure to a conventional R index of 0.029 for 5422 reflections. The molecule is composed of cations (C18H36O6EuNO3)2+ and anions [Eu(NO3)5· H2O]2−. In the cation, the europium(III) ion enclosed in a [2.2.2] molecule is coordinated with eight oxygen and two nitrogen atoms, forming a 10-coordinate complex ion (cryptate), while the other europium(III) ion is bonded to eleven oxygen atoms in the anion.

Syntheses and Structure of a Molybdenum Cystemato Complex with Sulphur Bridges, K2[Mo2O2S2(Cys)2] · 4H2O · Ch3Oh

Abstract A new method for preparing a molybdenum cysteinato complex with sulphur bridges is described. The complex was obtained from the system Most4 2-/ (HSCH2CII(NH2)COOH · HCl)/KOH with MeOH and water as solvents under dinitrogen atmosphere at ambient temperature. The complex crystallizes in the monoclinic system, space group P21 with unit cell parameters a = 7.0040(14) A, b = 15.955(3) A, c = 10.072(2) A, B = 91.38°; V = 1125.2(4) A3; Z = 2; Dc = 1.941 g cm−3; u = 18.9 cm−1. The final R = 0.0365 for 2219 observed reflections with I > 2 0 (I) and 277 parameters. The coordination polyhedron of molybdenum is distorted octahedral, and a terdentate cysteine ligand coordinates via N, S and O to the molybdenum atom.