Structure of Coordination Polymer, 〔Zn(bipy)(H_2O)_3SO_4〕·2H_2O (bipy=4,4'-bipyridine)

1　INTRODUCTION4,4' bipyridine( bipy) is a good candidate for building open framework struc ture because of their rodlike rigidity and length.Framework structures formed bytransition metalsbridged by bipy vary with metaland anion.The structures of Zn bipy system include interpenetrating square grid sheets〔 Zn( bipy) 2 ( H2 O) 2 〕Si F6〔1〕,two dimensionallayer〔 Zn( bipy) ( H2 O) 4 〕( NO3) 2 · bipy〔2〕,〔 Zn( bipy) ( H2 O) 4 〕 ( NO3) 2 · 2 bipy· 3 H2 O〔2〕 and〔 Zn( bipy)…     

Synthesis and Structure of a Mixed Phosphine- Thiolato Polymer with a Linear Chain Network [Ag_2(μ_2-dppe)_3 (S-mbo)_2]_n·2nDMF [dppe = 1,2-Bis (diphenylphosphino) ethane, Hmbo = 2-Mercaptobenzoxazole]

Diphosphino organochalcogenide metal complexes have been investigated presently fortheir possible use as anti-cancer agents[1-3]. However, the area of silver complexes withmixed phosphine-thiolato ligands has scarcely been touched[4]. As a heterocyclic thiolato ligand with potential S and N donors, 2 -mercaptobenzoxazole (Hmbo) is interesting because ofthe structural chemistry of its multifunctional coordination modes (unidentate-N, unidentateS or bidentate-N: S)[5-8]. Until now, Ag-mbo com…     

Synthesis and Crystal Structure of [Zn(HPDB)_2(H_2O)_2]n·2nDMSO·2nH_2O (H_2-PDB = Pyridine-3,4-dicarboxylic Acid)

1 INTRODUCTION Metal-organic coordination polymers are currently of considerable interest and importance because they can be used as new functional materials applicable in adsorption, luminescent and NLO materials fields[1, 2]. Due to the manifold N- and O-donors of pyridine- (bi)carboxylic ligands, metal pyridine-(bi)carboxyla- tes can construct versatile structural motifs, which finally aggregate to generate various supramolecular architectures with interesting properties[3, 4]. The d…     

Synthesis and Crystal Structure of a One-dimensional Azido-bridged Manganese (II) Compound [Mn(N_3)_2(H_2O)_3·C_6H_(12)N_4]_n

1 INTRODUCTION The azide anion is a good bridging ligand for di- valent metal ions to form discrete, one-dimensional, two-dimensional or three-dimensional complexes. In recent years, these complexes have drawn consider- able attentions for their interesting magnetic charace- ristics which attribute to the efficient magnetic coup- ling ability of the azido bridges[1]. When the azide anion acts as a bridging ligand, two typical modes are adopted: end-to-end (EE, μ1, 3) or end-on (EO, μ1…     

HYDROFORMYLATION OF 1-HEXENE WITH Rh_4(CO)_(12) AND [Rh(CO)_2Cl]_2

The hydroformylation of hexene-1 catalyzed by Rh_4 (CO)_12 and 〔Rh(CO)_2Cl〕_2 andthe effects of solvents (benzene, n-heptane and THF) and PPh_3 on the activity andselectivity of the catalysts were studied.The results indicated that the activity of Rh_4(CO)_(12) decreased with increasing solventpolarity and it did not change appreciably with addition of PPh_3 when the molar ratioPPh_3/Rh_4(CO)_(12)≤4. Thc activity of Rh_4(CO)_(12) was over twice as large as that of〔Rh(CO)_2Cl〕_2 when calculated according to the number of moles of rhodium clusters inbenzene without PPh_3, but the activities of both Rh_4(CO)_(12) and 〔Rh(CO)_2Cl〕_2 wereabout the same when calculated according to the number of rhodium atoms. It is suggestedthat the clusters probably dissociated into the similar active rhodium mononuclear speciesunder the reaction conditions and the species formed a cluster similar to Rh_4(CO)_(12) againwhen the conditions were reduced to the ambient temperature and pressure.     

The Synthesis and Structural Characterization of Two-dimensional Coordination Polymer {[Ni(phen)H_2O](μ_4-C_( 10)H_2O_8)_(1/2)}_n

The successful preparation of coordinationpolymers from modular precursors has provided afacile approach to develope solids and functionalmaterials[1— 4 ] . A popular strategy that could beemployed in the area is the adoption of bridgingligands such as cyanide,bi- pyridine,benzenetricarboxylate,etc.[3— 8] . In this context,multi- connecting carboxylates are at presentespecially interesting because they exhibit richcoordination chemistry by coordinating to metalions and have been proved to be…     

Synthesis and Crystal Structure of a Dicyanamide-bridged One-dimensional Gadolinium(III) Complex [Gd(dca)_3(phen)_2(H_2O)]_n

1 INTRODUCTION Dicyanamide is a versatile bridging ligand linking two or more metal ions with three nitrogen donor atoms[1～4]. The varieties of its coordination modes provide multifarious chances for designing new com- plexes with novel structures as well as interesting properties. Firstly, the complexes formulated as [M- (dca)2]n (M = Mn, Fe, Co, Ni, Cu, Cr)[5～9] mostly with 2D and 3D networks have been synthesized, and they usually exhibit high ordering temperatures. Afterwards, t…     

Synthesis and Structural Characterization of a Ni(Ⅱ) Complex [Ni(H_2O)_4(4,4'-bipy)_2](hca)_2

1 INTRODUCTION The rational design and synthesis of new metal- organic frameworks have generated considerable interest in supramolecular chemistry and materials science owing to their intriguing structural diver- sities and potential applications as functional mate- rials[1～6]. Carboxylate-containing ligands have attrac- ted considerable attention because of the various coordination modes of carboxylate group, the ability to form hydrogen bonds and the potential applica- tions as functio…     

STUDY ON TETRANUCLEAR TRANSITION METAL CLUSTER WITH μ_3-O BRIDGES I . SYNTHESIS AND CRYSTAL STRUCTURE OF [Fe_4O_2(O_2CCH_3)_7(2,2''''-bipy)_2]Cl

INTRODUCTION.The first tetranuelear oxo一bridged manganese eomplex eon-taining〔Mn4OZ〕“+eore was reported on its synthesis,strueture and magnetie proper-ties in 1 987〔‘〕,representing the best available model for the photosynthetie water oxi-dation eentre.In order to find out the relationship of aetivity with eonfiguration ofthis kind of eomplexes,a series of dual oxo一bridged tetranuelear eomplexes have beensynthesized in our laboratory〔2〕.In this paper the aeetato一bridged tetran…     

Synthesis and Crystal Structure of [(ArO)_2(THF)Sm(μ-OH)]_2·2THF(Ar=C_6H_(2-)~tBu_3-2,4,6)

1 INTRODUCTION Sm(II) chemistry has been extensively studied due to the strong reduction potential of this 4f6 ion[1]. The transformation of unsaturated substrates by Sm (II) complexes into products with unusual structures is one of the most interesting research areas. For the successful examples reported, Sm(II) starting mate- rials were restricted primarily to cyclopentadienyl complexes[2]. The reactivity of Sm(II) complex with phenolate ligands has seldom been explored. Recen- tl…     

[C_5H_5Fe(CO)_2]LnCl_2·nTHF和[C_5H_5Fe(CO)_2][C_5H_4(SiMe_3)]LnCl·nTHF双核配合物的合成

合成了稀土铁双核配合物:〔C_5H_5Fe(CO)_2〕LnCl_2·nTHF(Ln=Nd,Sm,Gd;n=1,2)和〔C_5H_5Fe(CO)_2〕〔C_5H_4(SiMe_3)〕·LnCl·nTHF(Ln=Nd,Sm,Gd;n=0,1,2)。元素分析,热分析,红外光谱和质谱分析确认了这两种配合物。红外光谱数据表明铁与稀土原子是以羰基桥连接。晶体结构分析表明〔(C_5H_5Fe(CO)_2〕Na·4THF是〔C_5H_5Fe(CO)_2〕LnCl_2·nTHF合成的中间体。     

Synthesis, Characterization and Structure of the Dimmer Complex [Ni(TSSB)(phen)H_2O]·C_2H_5OH·0.5H_2O

1 INTRODUCTION Schiff base complexes containing sulfur and com- plexes of amino acid Schiff bases[1～5] have recently aroused increasing interest because of their antiviral, anticancer and antibacterial activities. Taurine, an amino acid containing sulfur, is indispensable to human beings and has important physiological func- tions. Recently, we have found that the Shiff base derived from taurine has manifold coordination modes[4～10]. Aromatic-ring stacking interaction is an important …     

Synthesis and Crystal Structure of {Cu_2(pdc)_2(4,4''''-bipy)(H_2O)·3H_2O}_2

1 INTRODUCTION The increasing interest in inorganic-organic hybrid framework assemblies has resulted in a great number of research efforts focused on the develop- ment of new functional materials possessing various potential applications on catalysis, electrical conduc- tivity and magnetism[1～4]. In recent years, the inter- action of H2pdc with several metal ions has been extensively studied[5, 6] due to its unique ability to form stable chelates in diverse coordination modes such as bid…     

Synthesis and Crystal Structure of Na_(10)[LaSiW_(11)O_(39)(H_2O)_4]_2·22H_2O

1 INTRODUCTION The pseudoliquid character of heteropoly compounds as catalysts is determined by their crystallographic properties. Study on the crystal structures of the heteropoly compounds could provide interesting information to enrich heteropoly acid and catalytic chemistry[1]. In the past, Zhuo Ying-Li抯 group has synthesized the carbamidine salts of 1:1 LnL(Ln=lanthanide, L=[SiW11O39]n－)[2], and Pope抯 group has reported that -SiW11O39 units are connected by lanthanide catio…     

Synthesis,Crystal Structure,and Photoluminescent and Semiconductive Properties of [La(C_6NO_2H_5)_3-(H_2O)_2]_(2n)·(nH_5O_2)(nHgCl_5)(2nHgCl_4)·(2nH_2O)

A new heterometallic 4f-5d inorganic-organic metal-isonicotinic acid complex [La(C6NO2H5)3(H2O)2]2n·(nH5O2)(nHgCl5)(2nHgCl4)·(2nH2O) 1 has been synthesized via hydro-thermal reaction and structurally characterized. Complex 1 crystallizes in the space group C2/c of monoclinic system with four formula units in a cell:a =24.140(7),b=20.884(7),c=15.462(2),β=127.46(1)°,V=6187(3)3,C36H47Cl13Hg3La2N6O20,Mr=2224.24,Dc=2.388 g/cm3,Z=4,T=293(2) K,μ(MoKα)=9.401 mm-1,F(000)=4160 and R/wR=0.0376/0.0636 for 4130 observed reflections (I > 2σ(I)) and 5617 unique reflections. Complex 1 is characteristic of a one-dimensional polycationic chain-like structure. Photoluminescent investigation reveals that the title complex displays interesting emissions in violet and orange regions. The luminescence spectra show stronger orange emission than violet emission. Optical absorption spectra of 1 reveal the presence of a wide optical bandgap of 3.41 eV.     

Crystal Structure of Tris(2,2'-bipyridine)nickel(II) Tetrachlorozincate

1　INTRODUCTIONThe coordination chemistry oftransition metalcomplexeshasbecomeofremark able interestin recentyears.Sotoftetal.reported the structure of Ni( CH3CN) 6·Zn Cl4 〔1〕.Recently,Shyu etal.reported the structure of〔 Ni( bipy) 3〕〔 Fe( CN) 5 ( NO)〕· 3 H2 O〔2〕.Herein we reportthe structure oftitle complex〔 Ni( bipy) 3〕〔 Zn Cl4 〕 which issimilarto theformertwo complexes.Itisvery interesting to synthesizebimetallic compoundsfor both theoreticalstudy and practicalapp…     

CRYSTAL AND MOLECULAR STRUCTURE OF GUANIDINIUM BIS (o-AMINOPHENYLARSENIC) HEXAMOLYBDATE (CN_3H_6)_4[(o NH_2C_6H_4 As)_2Mo_6O_(24)]

<正> Guanidinium bis (o - aminophenylarsenic) hexamolybdate belongs to monoclinic space group P21/c,with a=10. 217(2),b= 18. 870(2),c= 10. 939(2)A,β = 102. 82(3)°,Z = 2,V=2056. 4A3,and Dc=2. 477 g·cm-3. Each molecule contains one [(o-NH2C6H4As)2Mo6O24]4- anion and four CN3H6+ cations. In the anion,six distorted MoO6 octahedra are connected with edges-sharing to form a six-membered Mo ring which is capped above and below by two o - aminophenylarsenic groups. There is half a molecule in an asymmetric unit. It is interesting that both phenyl planes are almost perpendicular to the plane of the Mo atoms. The structure of the anion is similar to that of [ (CH3 As)2Mo6O24]4-,[(n-C3H7As)2Mo6O24]4- or [(C6H5CH2As)2Mo6O24]4-. This is the first example of this type of compounds in which the As atom is directly connected to a substituted phenyl group.     

STRUCTURE OF PENTAAQUO PYROMEL DIZINE (Ⅱ)-DIHYDROUS [C_6H_2(COO)_4Zn_2(H_2O)_5]·2H_2O

Crystal and molecular structure of [C6H2(COO)4Zn2(H2O)5]·2H2O has been determined by X-ray diffraction technique, Mr = 507. 0,monoclinic,space group P21/n,a = 5. 925(1), 6 = 23. 613(9) ,c= 11. 790(5) A ,β= 96. 36 (3)°, V=1639. 3 (1. 0) A3,Z=4,DC = 2. 05g/cm3,λ=0. 71069 A,μ(MoKa) = 30. 9/cm-1,F(000) = 1024e. The structure was solved by Patterson and Fourier techniques and refined by least-squares method to a final conventional R value of 0. 055(Re = 0. 059)for 1557(I>3σ(I))reflections. Both atoms Zn(1) and Zn(2) are bridged by the Z,E-type of the car-boxyl group, in addition, Zn (1) is monodentate-bonded to the three remaining carboxyl and Zn(2) is bonded to five water molecules. The crystal structure shows a 2-dimensional polymeric network along(010)face. The Zn(l) -O distances are in the range of 1. 94~ 2. 01 A (average 1. 98 A ). The Zn(2) -O distances are in the range of 2. 06~2. 21 A (average 2. 12A).     

FORMATION AND CRYSTAL STRUCTURE OF (Et_4N)_2[Fe(SC_6H_4CH_3-P)_4]

<正> INTRODUCTION. In the study of synthetic methods and chemical reactions of Mo-Fe-S cluster compounds for simulation of the catalytic active center of nitrogenase, the reaction.systems of MoS_4~(2-) and varios ferric or ferrous salts have caused the interests of many chemists. We have been studying the system of ferrous thiolates and thiomolybdates and found interesting results. In a previous paper, we reported the syn-     

Synthesis and Crystal Structure of Mo(CO)_4(NNP) (NNP=2-(N-Cyclohexyl-N-diphenylphosphinomethyl)aminopyridine)

1 INTRODUCTION The pyridyl-phosphine ligands have been widely used for many years to synthesize hetero- or homo-nuclear metal complexes[1], as electronic differentiation associated with the hard (N) and soft (P) donor atoms dictates their unique reactivities and coordination modes. One of the most common pyridylphosphines studied to date is (2-C5H4N)PPh2 which displays numerous ligating modes ranging from P-coordination and P,N-chelation to the more common P,N-bridging of two metal …