Yu-Guo Fan

One- and two-dimensional framework materials constructed from the mixed Mo/V tetra-capped Keggin structure clusters and M(en)2 (M=Ni, Cu) complexes groups

Abstract Two novel low-dimensional framework materials, [ Ni ( en ) 2 ] 2 [ Ni ( en ) 2 Mo VI 6 V VI 10 O 40 ( V IV O 4 )]·4 H 2 O (1) and [ en ] 0.5 [ Cu ( en ) 2 ] 2 [ Cu ( en ) 2 Mo VI 6 Mo V 2 V IV 8 O 40 ( Mo IV O 4 )]·0.5 H 2 O (2), assembled hydrothermally, are constructed from the mixed Mo/V tetra-capped Keggin structure clusters linked through M(en)2(M=Ni,Cu) groups.

A metal-oxo cluster-supported transition metal complex: synthesis, structure and properties of [Cu(phen)2]2[{Cu(phen)}2Mo8O26]·H2O

Abstract [Cu(phen)2]2[{Cu(phen)}2Mo8O26]·H2O has been synthesized from MoO3, H2MoO4, Cu(Ac)2·H2O and 1,10-phenanthroline in aqueous solution using the hydrothermal method and characterized by single-crystal X-ray structure analysis. The title compound consists of a centrometric β-octamolybdate-supported complex anion [{Cu(phen)}2Mo8O26]2−, two bis-phenanthroline Cu(I) cations, and one water molecule of crystallization.

Crystal structure and magnetic properties of a Cu4O4 cubane complex with N-(2-hydroxybenzyl)-propanolamine

Abstract The crystal structure of [ Cu ( L 1 )] 4 ( 1 ) (H2L1=N-(2-hydroxybenzyl)-propanolamine) contains a Cu4O4 cubane core, involving four intramolecular hydrogen bonds. Magnetic studies reveal a good linear correlation between 2J and the bridge angle φ; the more antiferromagnetic trend than the literature correlations for the alkoxo-bridged complexes is ascribed to the additional superexchange pathways via the multiple hydrogen bonds.

Syntheses and structures of two- and three-dimensional coordination networks generated from silver complexes and hmt (hmt=hexamethylenetetramine)

Abstract Ag(CO2PhCO2)Ag reacts with hexamethylenetetramine (hmt) in acetonitrile solution in the ratio 1:2 to yield the network [Ag2(μ3-hmt)2(μ-O2CPhCO2)]·7H2O, in which AgCO2PhCO2Ag units intercalate between the two-dimensional honeycomb-like layers to give a three-dimensional open network, while Ag(MePhSO3) reacts with hmt in the ratio 2:1 to produce the coordination network Ag2(μ4-hmt)(MePhSO3)2, consisting of two-dimensional grids with square cavities. The X-ray diffraction studies show that these two metal complexes can be used as molecular building blocks in the synthesis of silver–hmt networks.

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.

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.

The Synthesis and Structure of A. New Oxomolybdenum Complex with Oxalate as Ligand

Abstract An oxomolybdenum complex with oxalate as ligand has been synthesized by the reaction of (NH4)2MoS4 and K2C2O4H2O in the presence of KOH. The crystal structure of the complex K2[MoO3(C2O4)]H, O (1) has been determined by X-ray diffraction. The crystals belong to the monocinic space group P21 /a, with a = 7.544 (1) A, b = 12.767 (3) A, c = 8.710 (4)A, P. = 95.10 (2)°, Z. = 4, V. = 835.6 (5) A3, F (OOO) = 632, R. = 0.025 and Rw = 0.042. The structure analysis reveals that the complex is a new infinite-chain compound, in which each molybdenum atom is coordinated to bridging oxo, terminal oxo and oxalato ligand, forming a distorted octahedron.

Dichloro{2-[(η5-cyclopentadienyl)phenylmethyl]phenolato-O}titanium

The title compound, [TiCl 2 (C 18 H 14 O)], with a chiral C atom, crystallizes as a racemate. The Ti-O bond length is 1.794 (3) A. The plane of the cyclopentadienyl ring forms dihedral angles of 68.8 (7) and 79.2 (6)° with the two phenyl rings.

A three-dimensional neutral framework of a novel decavanadium cluster bridged by an AsO4 tetrahedron: [AsVIV8VV2O26(μ-H2O)]·8H2O

A three-dimensional neutral framework of a novel decavanadate ion [VIV8VV2O26(μ-H 2O)] containing an AsO4 tetrahedral bridge has been synthesized hydrothermally and structurally characterized by X-ray diffraction.