Hydrothermal Synthesis and Structure of [（PbCl2）μ-PyZ）1/2]n （Pyz = Pyrazine）

1 INTRODUCTION Because of the flexibility of Pb(II) coordination sphere and the nonstereospecific nature of halide anions[1], the chemistry of lead halide complexes has been developed in recent years. Especially PbX2- based coordination polymers with nitrogen-contain- ing Lewis bases have attracted renewed interest[2～11]. The choice of ligand and the reaction condition are of great importance in determining the final topo- logy of the supramolecular materials. But the avail- able struc…     

Three Isomeric Chiral Metal-organic Frameworks Determined by Different Halogen Ions

Three isomeric metal-organic frameworks,[Cd2（X）（btc）（DMA）3]n（X = Cl（1）,Br（2）,I（3）,H3btc =1,3,5-benzenetricarboxylic acid and DMA = N,Nˊ-dimethylacetamide）,have been synthesized and characterized by elemental analysis,infrared spectra（IR）,thermogravimetric（TG） analyses and single-crystal X-ray diffraction.Single-crystal X-ray analysis reveals that compounds 1–3 crystallize in the orthorhombic P212121 space group,and feature a three-dimensional（3D） extended framework containing dinuclear [Cd2（COO）3] units as the secondary building units（SBUs）.Topological analysis reveals that compounds 1–3 can be simplified into a 3-connected srs topological network.     

Synthesis and Crystal Structure of [Zn(HPDB)2(H2O)2]n·2nDMSO·2nH2O (H2-PDB = Pyridine-3,4-dicarboxylic Acid)

The title complex [Zn(HPDB)2(H2O)2]n·(2nDMSO(2nH2O(H2-PDB is pyridine-3, 4-dicarboxylic acid and DMSO the dimethyl sulphoxide) was synthesized under traditional solution condition. Its crystal (C18H28N2O14S2Zn) belongs to monoclinic system, space group P21/c with a = 8.2791(6), b = 12.5495(10), c = 13.6519(11)(A), β = 105.294(2)°, V = 1368.18(18)(A)3, Z = 2, Mr = 625.91, Dx = 1.514 g/cm3, μ = 1.117 mm-1, F(000) = 648, R = 0.0654 and wR = 0.1654 for 2414 observed reflections (I > 2σ(I)). It has a 2-D planar network, in which the Zn atom is six-coor- dinated and hydrogen bonds between carboxylate groups, DMSO and water molecules result in the final 3D structure.     

A Three-dimensional Supramolecular Complex {[Co(H2btec)(2,2'-bipy)(H2O)3]·H2O}n Assembled via Hydrogen Bonding and π-π Stacking Interactions

A new cobalt compound, {[Co(H2btec)(2,2'-bipy)(H2O)3]·H2O}n (1, H4btec =1,2,4,5-benzenetetracarboxylic acid, 2,2'-bipy = 2,2'-bipyridine), has been synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR and X-ray powder diffraction. The crystal belongs to the triclinic system, space group P-1, with a = 7.230(3), b = 11.626(5), c =14.001(6) (A), α = 108.12(0)°, β= 95.85(0)°, V= 1095.33(157)(A)3, C20H20CoN2O12, Mr= 539.31,Z=2, Dc = 1.635 g/cm3,μ = 0.855 mm-1, F(000) = 554, R = 0.0427 and wR = 0.1042 for 3883 observed reflections (Ⅰ ＞ 2σ(Ⅰ)). The title compound features a discrete molecular structure, which is connected with each other through extensive O-H…O hydrogen bonds into an intricate 3D supramolecular network. Additionally, two different patterns of π-π stacking interactions further consolidate the framework.     

A Novel （4,6）-Connected Net Based on Dysprosium Benzenedicarboxylate, [Dy（OAc）（BDC）]n

A new lanthanide coordination polymer, [Dy（OAc）（BDC）]n 1 （OAc = acetate, BDC = 1,4-benzenediacarboxylate）, has been synthesized under hydrothermal conditions. Single-crystal X-ray diffraction analysis reveals that complex 1 has infinite zigzag Dy-OAc chains, which are further connected by BDC to form a 3D metal-organic framework. According to topology analysis, this framework can be characterized as （4,6）-connected （3.4.54）（32.4.56.66） net that has never been reported before. Crystal structure for 1： space group Pbca, a = 13.314（3）, b = 8.0269（18）, c = 20.275（5）A, V= 2166.8（9）A3, C10H7O6Dy, Mr = 385.66, Z= 8, Dc = 2.364 g/cm^3, μ= 6.910 mm^-1, F（000） = 1448, the final R = 0.0181 and wR = 0.0520.     

A simultaneous redox, alkylation, self-assembly reaction under solvothermal conditions afforded a luminescent copper(I) chain polymer constructed of Cu3I4- and EtS-4-C5H4N+Et components (Et = CH3CH2)

A simultaneous redox, alkylation, self-assembly reaction under solvothermal conditions afforded a novel copper(I) chain polymer constructed of luminescent Cu3I4- and unprecedented EtS-4-C5H4N+Et components (Et = CH3CH2).     

A Porous 3D Supramolecular Architecture of Cd(Ⅱ) Complex with Water Clusters as Pillars

A supramolecular complex of Cd(Ⅱ) with 1D water tapes as pillars[Cd2(dpa)2(phen)2- (H2O)2]·6H2O 1 (H2dpa = diphenic acid, phen = phenanthroline), has been synthesized and characterized by elemental analysis, IR spectroscopy, and single-crystal X-ray diffraction analysis. The crystal is of triclinic, space group Pī with a = 9.7029(4), b = 11.9601(5), c = 12.1788(4) A, a = 71.6990(10), β = 71.8740(10), γ = 74.4680(10)°, V = 1252.39(8) A3 C52H48Cd2N4O16, Mr = 1209.76, Z = 1, Dc = 1.604 g/cm3,μ = 0.925 mm-1, F(000) = 612, R = 0.0679 and wR = 0.2514 for 3870 observed reflections (Ⅰ > 2σ(Ⅰ)). Two intramolecular Cd(Ⅱ) centers of this complex are encircled by two dpa2- ligands forming an 18-membered ring, which is further assembled into a pillared three-dimensional (3D) supramolecular architecture through the synergetic effect of intermolecular face-to-face π…π stacking and weak O-H…O hydrogen-bonding interactions. Moreover, this complex exhibits photoluminescence with the main emission bands located at about 456 nm upon excitation at 355 nm in the solid state at room temperature.     

Synthesis and Crystal Structure of Molybdenum-Sulfur Cluster Compounds Coordinated by Nicotinic Acid and Isonicotinic Acid

Cuboidal Molybdenum have been paid much attention due to their structural resemble with those metallic centers in some biological systems^[1]. To explore the chemistry of trinuclear Mo-S cluster complexes^[2], we rationally synthesized two compounds:Mo₃S₄(DTP)₃(nicotinate)(Py)·EtOH (Ⅰ) (DTP=diethyl dithiophosphate) and Mo₃S₄(DTP)₃(isonicotinate)(Py)·EtOH (Ⅱ) by the substitution reaction of Mo₃S₄(DTP)₃(L)(Py) (L=ClCH₂COO-, CH₃COO-) with nicotinic acid and isonicotinic acid, respectively.     

Syntheses and Crystal Structures of Molybdenum-Sulfur Clusters Mo_3S_4 (dtp)_3(o-CH_3OC_6H_4COO)(Py) and Mo_3S_4 (dtp)_3(p-HOC_6H_4COO)(DMF)·EtOH

1 INTRODUCTION Recent years have seen a drastic increase of compounds containing the Mo3S4 core. A major synthetic route to these compounds is by the reaction of the aqua ion [Mo3S4(H2O)9]4+ with different kinds of ligands replacing some or all of the water molecules. In this way, Mo3S4(dtp)4(H2O), which was synthesized by the spontaneous- assembly method in 1986[1] and its structural characterization and chemical reactivity have been well recognized [2], can be rationally synthesize…     

^31P NMR Studies on the Ligand Dissociation of Trinuclear Molybde-num Cluster Compounds

A series of carboxylate-substituted trinudear molybdenum dus-ter compounds formulated as Mo3S4(DTP)3(RCO2)(L), where RffiH, CH3, C2H5, CH2Cl, CCl3, R^1C6H4(R^1 is the group on the benzene ring of aromatic carboxylate ), L=pyridine,CH3CN, DMF, have been synthesized by the ligand substitu-tion reaction. The dissociation of the loosely-coordinated ligand L from the cluster core was studied by ^31p NMR. The dissocia-tion process of L is related to the solvent, temperature, and acidity of carboxylate groups, so as to affect the solution struc-ture and reactive properties of the duster. The long-distance in-teraction between ligands RCO2 and L is transported by Mo3S4 core.