Synthesis and Crystal Structure of [Ni(C_5H_2N_2O_4)(2,2''''bipy)(H_2O)_2]·H_2O

1 INTRODUCTION Orotic acid (H3dtpc), an important pyrimidine derivative as the effective precursor in the biosynthesis of pyrimidine base of nucleic acids in living organisms, plays a unique role in bioinorganic and pharmaceutical. Aside from the biological interest, orotic acid is also interesting in coordination chemistry. Its ketonic and enolic tautomers along with asymmetric geometry make it to be a very good versatile polydentate ligand[1~5]. The incorporation of metals into supram…     

Synthesis and Crystal Structure of a Co（ Ⅱ ） Complex with Taurine-5-methyl-2-hydroxyisophthalaldehyde Schiff Bases [Co（C13H16N2O7S2）（H2O）3]2·H2O

The title complex [CoL（H20）3]2·H2O （C26H46N4O21S4CO2）, where L = taurine-5- methyl-2-hydroxyisophthalaldehydes, has been synthesized and characterized by IR and X-ray diffraction analysis. The crystal of the complex belongs to the triclinic system, space group P1, with a = 11.197（4）, b = 13.309（5）, c = 14.486（5） ]A, a = 78.827（13）,β = 70.547（11）, γ = 81.058（13）°, Mr = 996.77, S = 1.08, V= 1987.2（13） A3, Z = 2, Dc = 1.666 g/cm3, F（000） = 1032,μ = 1.131 mm^-1, R = 0.0633 and wR = 0.1293. According to the structural analysis, the Co（ Ⅱ ） ion adopts a slightly distorted six-coordinated octahedral geometry. One N atom of the Schiff base of each molecule was hydrogenated to form hydrogen bond with O atom. Two coterminous molecules packed in one crystal water molecule are linked by intermolecular hydrogen bonds, thus generating an infinite chain constructed by hydrogen bonds.     

Synthesis and Crystal Structure of Cobalt(II) Complex [Co(H_2O)_2(bpe)(OAc)_2]·4,4''''-dpdo

1 INTRODUCTION Recently construction of new coordination poly-mer networks through the rational combination oforganic ligands ‘spacers’and metal ‘nodes’ is an areaof intense interest[1～3] because of their capability ofshowing novel magnetic[4], nonl     

Synthesis and Crystal Structure of a Novel Co(II)-Nitronyl Complex [Co(IM2-Py)(PCA)(N_3)_2]

1 INTRODUCTION The design and synthesis of molecule-based mag-netic materials is one of the major subjects of mate-rials science. Nitronyl nitroxides acting as useful pa-ramagnetic building blocks have been extensively usedto assemble molecular magnetic materials in the pastfew years[1～5]. However, their weakly basic charac-ter strongly limits their coordination ability. Mean-while, the azide anion is a versatile ligand which canlink the transition metal atoms with different coor-dinatio…     

Synthesis and Crystal Structure of (C_6N_3H_(18))_2Ti_4O_4(C_2O_4)_7·4H_2O

1 INTRODUCTION The open-framework inorganic materials have been synthesized before the early 1980s[1]. Parti- cularly, metal phosphates have been investigated widely during the past few years[2, 3]. In recent years, considerable efforts have been devote…     

Synthesis and Crystal Structure of Neodymium Complex[Nd (C_(18)H_(20)N_2O_4) (NO_3)_3]

1INTRODUCT1oNMeta1liccomplexesofsomeSchiffbaseshaveantiviraIandfungistaticac-tivies[1-3i.SomeSchiffbasemetalliccomplexeshavecatalyticactivityasenzyme"'.Thisaspectacu1arresearchfield-WehavereportedthesynthesisandcrystalstructureofNd(llI)nitratecomplexwithN,N-disalicyclideneethylenediamineandDMSO(si'HerethetitlecomplexwasobtainedandcharacterizedbyX-raydiffrac-tion'Theligandisdischiffbaseofcondensationfrom2-hydroxyl-3-methoxyben-zoaldehydeandethylenediamine.2EXPERIMENTAL2.1Synthesi…     

Synthesis and Structure of Copper(Ⅱ) Complex [Cu(C_5H_5N)_2(H_2O)(C_6H_5COO)_2]

1　ＩＮＴＲＯＤＵＣＴＩＯＮＣｅｒｔａｉｎｃｏｐｐｅｒｃｏｍｐｌｅｘｅｓｈａｖｅｂｅｅｎｓｈｏｗｎｔｏｈａｖｅｕｎｕｓｕａｌｃｈｅｍｉｃａｌｐｒｏｐｅｒｔｉｅｓｓｕｃｈａｓｏｘｙｇｅｎｔｒａｎｓｆｅｒ,ｏｘｉｄａｔｉｖｅａｄｄｉｔｉｏｎａｎｄｈｏｍｏｇｅｎｏｕｓｃａｔａｌｙｔｉｃｈｙｄｒｏｇｅｎａｔｉｏｎ[1].Ｏｘｉｄａｔｉｖｅａｄｄｉｔｉｏｎｒｅａｃｔｉｏｎｓａｒｅｋｅｙｓｔｅｐｓｉｎｔｈｅａｃｔｉｖａｔｉｏｎｏｆσｂｏｎｄｓｉｎａｇｒｅａｔｎｕｍｂｅｒｏｆｃａｔａｌｙｔｉｃｐｒｏｃｅｓｓ.Ｃｏｐ…     

Synthesis and Crystal Structure of [Cu_2(DMF)(H_2O)(C_7H_4NO_4)_2(C_7H_3NO_4)]_2·3.5DMF

A new copper(II) complex [Cu2(DMF)(H2O)(C7H4NO4)2(C7H3NO4)]2·3.5DMF has been synthesized and its structure was determined by single-crystal X-ray diffraction.The crystal is of triclinic,space group P1 with a = 10.722(3),b = 18.170(4),c = 20.923(7),α = 105.297(9),β = 101.701(10),γ = 105.74(1)°,V = 3615(1) 3,Z = 2,C58.50H64.50Cu4N11.50O31.50,Mr = 1686.90,Dc = 1.550 g/cm3,μ = 1.255 mm-1,F(000) = 1728.00,T = 150(2) K,the final R = 0.0640 and wR = 0.173 for 11310 observed reflections with I > 2σ(I).In the crystal,each formular unit consists of two dinuclear copper(II) compounds,between which the O-H···O hydrogen bonds exist.Each CuII cation is six-coordinated in an octahedral geometry.The intermolecular hydrogen-bonding interaction leads to a 3-D framework of the title compound.     

Synthesis, Crystal Structure and Luminescence Property of [Co(hmz)_2(H_2O)_4]·2H_2O

A new mononuclear Co(II) complex, [Co(hmz)2(H2O)4]·2H2O, has been synthesized by the reaction of Co(CH3COO)2·4H2O with 1-(4-hydroxyphenyl)-5-mercaptotetrazole (Hhmz). It crystallizes in the monoclinic system, space group P21/n with a = 13.502(5), b = 6.718(3), c = 13.972(6) , β = 117.532(4)o, V = 1123.9(8) 3, Z = 2, M r = 553.45, F(000) = 570, Dc = 1.635 g/cm3, μ = 1.008 mm–1, the final R = 0.0272 and wR = 0.0684 for 2194 observed reflections (I > 2σ(I)). The Co(II) is six-coordinated by two nitrogen atoms from two hmz–1 ligands and four water molecules, forming an octahedral geometry. The intermolecular hydrogen bonding and offset-panel π-π stacking interactions between the adjacent molecules extend the compound into a three- dimensional supramolecular framework. The title compound emits strong blue fluorescent light (λem(max) = 427 nm) at room temperature and is red-shifted compared with free ligand Hhmz (λem(max) = 342 nm).     

Crystal Structure of [Cu(C_(21)H_(25)N_2O_4) (H_2O)_2]·NO_3·2H_2O

ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆ［Ｃｕ（Ｃ_（２１）Ｈ_（２５）Ｎ_２Ｏ_４）（Ｈ_２Ｏ）_２］·ＮＯ_３·２Ｈ_２ＯＷｕＪｉｅ－Ｙｉｎｇ;ＸｉｅＦｕ－Ｘｉｎ;ＴｉａｎＹｕ－Ｐｅｎｇ;ＣｈｅｎＹａｏ;ＮｉＳｈｉ－Ｓｈｅｎｇ;ＤｕＳｈａｏ－Ｗｕ;ＷｕＸｉｎ...     

Synthesis and Crystal Structure of [Cu(phen)_2(SO_4)(H_2O)]·0.5C_4H_4O_4·7H_2O

1INTRODUCTION The construction of metal-organic coordination polymers based on covalent interactions[1]or supra-molecular contacts such as hydrogen-bonding and/orπ-πinteractions)[2]is now of great interest not only due to the enormous variety of intriguing structural topologies themselves,but also to their unexpected physical and chemical properties for potential prac-tical applications as functional materials.Many N-containing ligands,such as4,4?-bipyridine,2,2?-bi-pyridine and1,10-phen…     

Synthesis and Crystal Structure of an Azide Bridged Binuclear Zinc(Ⅱ) Dimer Containing Taurine Schiff Base [Zn_2(C_8H_9N_2O_3S)_2·(N_3)_2·(H_2O)_2]_2·_2H_2O

1 INTRODUCTION The investigation of Shiff base complexes con- taining sulfur and complexes of amino acid Schiff bases[1, 2] has recently aroused considerable interest due to their antiviral, anticancer and antibacterial activities. Taurine, known as 2-aminosulfonic acid, is indispensable to human beings and plays an im- portant role in physiological functions. In this con- tribution, we present the synthesis and crystal struc- ture of a new binuclear Zn(II) dimmer with a tri- dentate Sc…     

Synthesis and Crystal Structure of a New Charge-assisted Hydrogen-bonded Host Framework [Co(en)_3]_2[Zr_2(C_2O_4)_7]·2H_2O

Using the deep eutectic solvent formed of oxalic acid and choline chloride, a new charge-assisted hydrogen-bonded host framework [Co(en)3]2[Zr2(C2O4)7]·2H2O(1) has been obtained. The title complex crystallizes in the monoclinic, space group P21/n(No. 14) with a = 7.7448(10), b = 14.5683(19), c = 19.375(3), β = 92.124(2)o, V = 2184.5(5) 3, Z = 4, Dc = 1.996 g.cm-3, F(000) = 1332, μ = 1.328 mm-1, R = 0.0353 and w R = 0.0718(Ⅰ 2σ(Ⅰ)). Single-crystal structure analysis reveals that the title complex possesses a 3D network assembled through a multitude of charge-assisted hydrogen bonds between the in situ generated anionic coordination complexes [Zr2(C2O4)7]6- and metal complexes Co(en)33+.     

Synthesis and Crystal Structure of Co(C_6NO_2H_4)_3. H_2O

1INTRoDUCTIONAlotofresultsoncobaltcomplexstructureshavebeenreportedforseveraldecades.Theinterestofresearchinthisfieldhasneverbeenreducedbecausethecobaltcomplexesplayaveryimportantroleinthelifescienceandcatalysis,etc[1-6).WereportherethesynthesisandstructureofcomplexCo(C,NO,H'),.H,O.2EXPERIMENTALAllreagentsandsolventsusedareofARgradefromcommericalsourceswithoutfurtherpurification.ThetitlecompoundCo(C,NO,H,),.H,Owassynthesizedbythefollowingmethod.When2.4g(ca.1mmol)ofCoCl2.6H2Ow…     

Synthesis and Structure of a New Copper(II) Complex Cu(C_(13)H_9N_3O_2Br)_2.H_2O

1 INTRODUCTION Owing to their biological activities and chemical/industrial versalities, considerable attention has been continually attracted to metal-hydrazine complexes. For instance, Schiff base hydrazine and its analogues have been well studied in order to better understand the action mechanism of Vitamin B6-containing enzymes[1~3]. Six-coordinated copper(Ⅱ) complexes are of considerable interest, mainly due to their coordination geometry and spectroscopic properties[4]. Due to th…     

Non-Isothermal Decomposion Kinetics of Supermolecule Compound [Eu(C_(10)H_9N_2O_4)(C_(10)H_8N_2O_4)(H_2O)_3]_2·phen·4H_2O

Europium(Ⅲ) compound with 2-oxopropionic acid salicyloyl hydrazone (C_(10)H_(10)N_2O_4,H_3L) and 1,10-phenan-throline (C_(12)H_8N_2,phen) has been prepared.A yellow prismatic crystal of the compound was obtained,and themolecule crystallized in the triclinic space group P-1.There are two 9-coordinated complex molecules in everystructure unit,where every Eu atom is coordinated by three water molecules and two tridentate C_(10)H_(10)N_2O_4 ligands,forming two stable pentacycles.The coordination polyhedron around Eu~(3+) was described as a single cap squareantiprism.In the crystal cell,there are one free 1,10-phenanthroline and four water molecules.The thermaldecomposition of the compound and its kinetics were studied by non-isothermal thermogravimetry.The Kissinger'smethod and Ozawa's method were used to calculate the activation energy value of the first-step decomposition.Thestages of the decompositions were identified by TG-DTG-DSC curve.The non-isothermal kinetic data were ana-lyzed by means of integral and differential methods.The possible reaction mechanism and the kinetic equationswere investigated by comparing the kinetic parameters.     

Synthesis and Crystal Structure of a Copper(II) Complex with α-Hydroxylated Acid, [Cu(C_(14)H_8O_3)(C_5H_(13)NO)(H_2O)].0.5H_2O

1 INTRODUCTION There has been considerable interest of copper(II) -hydroxylate complexes in the structural chemistry and biochemistry. There are two structural types in copper(II) -hydroxylate com- plexes: mononuclear[1~6] and dinuclear structure[7~9]. The present work is a part of our study on the copper complexes of -hydroxylated acid and reports the synthesis and structure of a mononuclear copper(II) complex with 9-hydroxy- fluorene-9-carboxylato acid, [Cu(C14H8O3)(C5H13- NO)(H…     

Synthesis,Crystal Structure and Fluorescent and Thermal Stability Properties of the Zinc(Ⅱ) Complex [Zn(C_(15)H_(11)O_3)_2(C_(12)H_8N_2)_2]·5H_2O

A new complex has been synthesized with o-methylbenzoyl-benzoic acid(HL) and 1,10-phenanthroline(phen) in the mixture of water and ethanol. It crystallizes in monoclinic, space group C2/c with a = 13.6328(18), b = 17.7876(18), c = 19.998(2), β = 104.720(4)o, C54H48N4O11Zn, Mr = 994.33, V = 4690.2(9)3, Dc = 1.408 g/cm3, Z = 4, F(000) = 2072, μ(MoKα) = 0.59 mm-1, R = 0.0736 and wR = 0.2029. The crystal structure shows that the zinc ions are coordinated with two oxygen atoms from two HL molecules and four nitrogen atoms from two phen molecules, forming distorted octahedral coordination geometry. The fluorescent and thermal stability properties of the complex are studied. The result shows that it has one fluorescent emission band at around 412 nm. In addition, the complex is stable under 210 ℃.     

Solvothermal Synthesis,Crystal Structure and Electrochemical Property of Complex [Co(p-MBA)_2(2,2′-bipy)(H_2O)]·(H_2O)

One novel complex [Co(p-MBA)2(2,2′-bipy)(H2O)]·(H2O) has been synthesized by the reaction of p-methylbenzoic acid with 2,2′-bipyridine in the solvent mixture of water and methanol. It crystallizes in triclinic,space group P1 with a=0.70479(14),b=1.1211(2),c=1.6718(3) nm,α=103.806(3),β=90.795(3),γ=104.207(3)o,V=1.2399(4) nm3,Mr=512.41,Dc=1.373 g/cm3,Z=2,F(000)=532,μ=0.733 mm-1,R= 0.0432 and wR=0.0957. The crystal structural analysis shows that the cobalt atom is coordinated with three oxygen atoms from two p-methylbenzoic acids and one water molecule and two nitrogen atoms from one 2,2′-bipyridine,forming a distorted square-pyramidal coordination geometry. The cyclic voltammetry behavior of the complex is also reported.     

Synthesis and Crystal Structure of a Novel Zinc Complex [Zn(OH_2)(HDPA)_2]·3H_2O

1INTRODUCTION In recent years,dicarboxylic acids have been wide-ly used as poly-dentate ligands involved in various metal chelation reactions to form transition or rare earth metal complexes with interesting properties in material science[1~3]and biological systems[4~7].For example,Kim,Y.and his coworkers focus on the syn-theses of copper(II)complexes containing ligands of malonate and pyrazine to study their electronic con-ductivity and magnetic property[8].The importance of Tr(II)/dic…