检索结果-南通市图书馆

Chinese Journal of Structural Chemistry 2007年第2期26卷 194-198页

作者： wang jing-ping wang Wei NIUjing-Yang Institute of Molecular and Crystal Engineering School of Chemistryand Chemical Engineering Henan University Kaifeng 475001 China

A novel polyoxometalate-based composite compound [Ni（phen）2][Hphen]（AsW12040）（phen = 1,10-phenanthroline） I has been hydrothermally synthesized and characterized by elemental analysis, IR, TGA, ESR spectroscopy and single-crystal X-ray diffraction. Each structure unit of 1 consists of one polyoxoanion AsW12O40^3-, one free phenanthroline molecule and one coordination cation [Ni（phen）2]^2＋. The title compound crystallizes in the orthorhombic system, space group F212121, with a = 12.2383（7）, b = 21.0884（11）, c = 22.3237（12） A, V= 5761.4（5） A^3, Mr = 3520.44, Z = 4, Dc = 4.059 g/cm^3, F（000） = 6204, g（MoKα） = 24.844 mm^-1, GOF = 1.022, the final R = 0.0376 and wR = 0.0742 （I 〉 2σ（I）） for 865 parameters and 9637 observed reflections with I 〉 2σ（I）.

关键词： polyoxotungstate hydrothermal synthesis Keggin structure ESR

Synthesis and Crystal Structure of a Mn(II) Complex with Thiosemicarbazone Derivative of Pyridine-3-carbaldehyde Showing Unusual Coordination Mode of Tridentate Thiosemicarbazone

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第10期25卷 1275-1279页

作者： LI Ming-Xue ZHOU jing wang jing-ping wang Zi-Liang Institute of Molecular and Crystal Engineering College of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

The title complex Mn（HL）4（NCS）2（CH3CH2OH）2 has been achieved via selfassembly by incorporating manganese（Ⅱ） into pyridine-3-carbaldehyde thiosemicarbazonate ligand, and characterized by elemental analysis and single-crystal X-ray diffraction study. The crystal crystallizes in triclinic, space group PI^-, with a = 8.896（2）, b = 9.530（2）, c = 14.520（4）°A, α = 87.035（4）, β= 88.112（4）, γ= 69.434（4）°, V= 1150.9（5）°A^3, Z = 1, Mr = 984.17, Dc = 1.420 g/cm^3,μ（MoKα） = 0.612 mm^-1, F（000） = 511, the final R = 0.0574 and wR = 0.1547 for 2855 observed reflections with I〉2σ（I）. The complex contains one six-coordinated manganese ion connected by two thiosemicarbazide ligands, in which the thiosemicarbazone ligand acts as a monodentate ligand and coordinates to the center metal atoms via the pyridyl nitrogen atoms, two ethanol molecules and two isothiocyanic anions to give rise to a mononuclear structure. The coordination of a potentially tridentate thiosemicarbazone in manganese（Ⅱ） complex without using its sulfur and imine nitrogen sites is unusual. Hydrogen bonds existing in the complex link the different components to stabilize the crystal structure.

关键词： crystal structure thiosemicarbazide manganese hydrogen bond

Crystal Structure of the 1:2 Stoichiometric Nd: [α-SiW_(11)O_(39)]^(8-): K_5Na_5H_3[Nd(α-SiW_(11)O_(39))_2]·6H_2O

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第2期26卷 234-238页

作者： HAN Qiu-Xia wang jing-ping NIU jing-Yang Basic Experiment Teaching Center Henan University Kaifeng 475001 China Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

Single-crystal X-ray structural analysis of K5Na5H3[Nd（α-SiW11O39）2]·6H2O （triclinic, space group P1^-, a = 13.7738（10）, b = 19.722（2）, c = 20.6647（15） A, α = 111.0090（10）, β = 105.1740（10）, y = 98.6870（10）°, Z = 2, V = 4867.2（8）, Mr = 5914.40, Dc = 4.026,μ = 26.754 mm^-1, F（000） = 5076, R = 0.0750 and wR = 0.2077） reveals that two [α-SiW11O39]^8- moieties are connected through one Nd atom which is in a square antiprismatic coordination environment by eight oxygen atoms from two [α-SiW11O391]^8- moieties. The Nd（Ⅲ） ion is substituted for a [WO]^4＋ unit in the ＂cap＂ region of the tungsten-oxygen framework of the parent Keggin ion. Disordered Na^＋ cations and water molecules reside outside these channels, leaving empty pores with an intersecting slot （13 A × 10 A）.

关键词： crystal structure characterization polyoxometalates

A Novel 3D Extended Network Cobalt Paradodecatungstate:Synthesis,Characterization and Crystal Structure of [Co(H_2O)_5]_2[Co(H_2O)_4]_3[H_2W_(12)O_(42)]·11H_2O

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第10期25卷 1167-1174页

作者： wang jing-ping REN Qing ZHAO Jun-Wei NIU jing-Yang Institute of Molecular and Crystal Engineering College of Chemistry and Chemical Engineering Henan University Kaifeng Henan 475001 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhcu Fujian 350002 China

A cobalt paradodecatungstate [Co（H2O）5]2[Co（H2O）4]3[H2W12O42]·11H2O has been successfully synthesized and structurally characterized by X-ray crystallography. Structure analysis indicates that the title compound is of monoclinic, space group P21/n, with a = 13.449（3）, b = 19.585（4）, c = 13.990（3） °A, = 113.79（3）°, V = 3371.8（12） °A^3, Z = 2, R = 0.0519 and wR = 0.1242. The title compound exhibits a novel 3D extended network structure constructed by interconnecting the paradodecatungstate polyanion [H2W12O42]^10- clusters and cobalt^11 coordination ions.

关键词： paradodecatungstate polyoxometalate cobalt Keggin structure

Hydrothermal Synthesis and Crystal Structure of a New 2D Layer Compound [{Ni(en)_2}_2Sb_8V_(14)O_(42)]·5.5H_2O

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2009年第4期25卷 426-429页

作者： YU Li LIU Jiang-ping wang jing-ping NIU jing-yang Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Ifenan University Kaifeng 475001 P. R. China

A new compound based on polyoxovanadate [{Ni（en）2}2Sb8V14O42]·5.5H2O（en=ethylenediamine）（1） was synthesised hydrothermally as black rhombus *** 1 crystallized in the monoclinic system with space group P21/n,Z=4,a=1.46953（9） nm,b=1.28623（8） nm,c=1.76008（11） nm,β=105.7230（10）°.In the asymmetric unit,cluster {Sb8V14O42} can be considered as an Sb derivative of the {V18O42} *** {Sb8V14O42} cluster as a building block interconnected to four other neighboring units by {Ni（en）2} bridging groups which are linked through the terminal oxygen atoms of the polyoxoanions,forming a two dimensional network.

关键词： Hydrothermal synthesis Antimony-substituted Polyoxovanadate

Hydrothermal Synthesis and Crystal Structure of a Hybrid Compound Based on β-Octamolybdate [Mn(2,2’-bipy)_3]_2[β-Mo_8O_(26)]·4H_2O

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第10期24卷 1164-1168页

作者： SHEN Yue YU Li NIU jing-Yang wang jing-ping School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

A hybrid compound [Mn（2,2＇-bipy）3]2[β-Mo8O26]·4H2O prepared by the hydrothermal method consists of a [β-Mo8O26]^4- isopolyanion, two isolated manganese-bipyridyl units [Mn（2,2＇-bipy）3]^2＋ and four crystal water molecules. Each [Mn（2,2＇-bipy）3]^2＋ is defined by six nitrogen atoms from three 2,2＇-bipyridine molecules forming a distorted MnN6 octahedron. Crystallographic data for the title compound： monoclinic, space group P21/c, a = 12.156（2）, b = 13.738（3）, c = 21.949（4） A,β = 90.44（3）°, V = 3665.3（13） A^3, Mr = 2302.57, Z = 2, Dc = 2.086 g/cm^3, F（000） = 2252, T= 293（2） K,μ（Mo-Kα） = 1.745 mm^-1, R = 0.0436, wR = 0.1056, and GOF = 1.074 for 550 parameters and 5515 observed reflections with I 〉 2σ（I）.

关键词： hydrothermal synthesis isopolyanion crystal structure octamolybdate

Synthesis and Crystal Structure of 2-Hydroxybenzoic Acid [1-(3,5-Dibromo-2-hydroxyphenyl)methylidene]hydrazide Methanol

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第5期26卷 547-550页

作者： wang Nong LI jing-ping PU Yan-Ling School of Chemical and Biological Engineering Lanzhou Jiaotong University Lanzhou 730070 China

A new Schiff base compound, 2-hydroxybenzoic acid [1-（3,5-dibromo-2-hydroxyphenyl） methylidene]hydrazide methanol （C14H10Br2N2O3·CH3OH）, has been synthesized by the condensation of equimolar 3,5-dibromosalicylaldehyde and 2-hydroxybenzoic acid hydrazide in a methanol solution. The compound was characterized by elemental analysis, IR spectra, and singlecrystal X-ray diffraction. The compound consists of a Schiff base moiety 2-hydroxybenzoic acid [1-（3,5-dibromo-2-hydroxyphenyl）methylidene]hydrazide and a lattice methanol molecule. The crystal belongs to the monoclinic system, space group P21/n with a = 7.183（1）, b = 15.673（2）, c = 15.001（2） A, β = 98.345（2）°, Z = 4, V = 1670.9（4） A^3, Dc = 1.773 g/cm^3, Mr = 446.10, λ（MoKα） = 0.71073 , μ = 4.872 mm^-1, F（000） = 880, R = 0.0458 and wR = 0.0963. A total of 3445 unique reflections were collected, of which 2236 with I 〉 2σ（Ⅰ） were observed. As expected, the molecule adopts a trans configuration about the C=N double bond. The two benzene rings are nearly coplanar （mean deviation from the combined plane is 0.061（4） ）, with the dihedral angle of 7.9（3）°. The preliminary biological tests show that the compound has moderate antibacterial activities.

关键词： Schiff base acylhydrazone crystal structure antibacterial activity

A Novel Ni-capped Silverton-type Complex: H_4{[Ni(H_2O)_3]_2[CeMo_(12)O_(42)]}·13.5H_2O

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第2期25卷 204-208页

作者： wang jing-ping SHEN Yue GUO Gui-Ling NIU jing-Yang School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

A novel Ni-capped complex H4{[Ni（H2O）3]2[CeMo12O42] }· 13.5H2O has been synthesized, which is the first Silverton-type anion capped with two Ni units via three terminal oxygen atoms. Crystallographic data for the title compound： Trigonal, space group R-3, a = 13.0950（19）, b = 13.0950（19）, c = 33.029（7） A, α = β= γ = 58.727（17）A °, V = 4905.1（14） A °^3, Z = 3, Mr= 2437.17, Dc = 2.475 g/cm^3, F（000） = 3462, T = 293（2） K, μ（MoKa） = 3.564 mm^-1, Rt = 0.0369, wR2 = 0.0905 and GOF= 1.079 for 151 parameters and 1963 reflections with I 〉 2σ（I） in the range of 1.85≤θ≤25.50°.

关键词： crystal structure Silverton-type Ni-capped

Synthesis and Structural Characterization of Manganese Carbonyl Incorporated Polyoxomolybdate (n-Bu_4N)_2[Mo_6O_(16)(OCH_3)_2{HOCH_2C(CH_2O)_3}_2{Mn(CO)_3}_2]

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2008年第6期24卷 675-678页

作者： wang jing-ping LI Ji-li NIU jing-yang Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 P R. China

The polyoxoanion incorporated {Mn（CO）3^＋} complex, （n-Bu4N）2[Mo6O16（OCH3）2{HOCH2C（CH2O）3}2·{Mn（CO）3}2]（1）, has been synthesized by the reaction of （n-Bu4N）4[Mo8O26] with Mn（CO）5Br in methanol, in the presence of C（CH2OH）4. The complex 1 has been characterized by IR, UV-Vis, X-ray single crystal diffraction, and TG. Crystal data for the complex 1：C25H48MnMo3NO16 （1）, Triclinic Pi, a=0.9405（3） nm, b=1.3351（4） nm, c=1.5455（4） nm, α=103.206（5）°, β=102.165（5）°, γ=100.784（5）°, V=1.7896（9） nm^3, Z=2, R1=0.0703, wR2= 0.1495. The structure analysis of complex 1 shows that the complex consists of two tetrabutylammonium cations and a polyoxomolybdate anion that incorporates two fac-Mn（CO）3^＋ units. The anion of complex 1 can be considered as the dimer of two rhomb-like anions by sharing of two comers.

关键词： Polyoxomolybdate Manganese Carbonyl

TBAF-catalyzed cyclization of 6-hydroxyhex-2-ynoates and 7-hydroxyhept-2-ynoates

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第8期22卷 931-934页

作者： Xiao Qing wang ping jing Jia Su ping Liu Wei Yu State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China

Tetrabutyl ammonium fluoride（TBAF） was found to be capable of catalyzing the intramolecular hydroalkoxylation of 6- hydroxyhex-2-ynoates and *** reaction could be used to prepare 2,5-substituted THF rings and 2,6- s... 详细信息

关键词： Tetrabutyl ammonium fluoride Et_3SiH Tetrahydrofuran Tetrahydropyran