Synthesis and 2D H-bonded Cd（ Ⅱ ） Network Structure of [Cd（C10H15N3）Cl2]

1 INTRODUCTION Transition metal Schiff base complexes have been extensively studied in the past two decades for their various crystallographic features, enzymatic reactions, steric effects[1～4], catalysis and magnetic properties[5, 6] as well as their important role in organisms[7, 8]. Most of these first-row materials are biologically essential with a number of their complexes showing bioactivities[9, 10]. Herein we describe the synthesis and X-ray structure of the cadmium (Ⅱ) compl…     

Hydrothermal Synthesis and Structure Characterization of Diamine-templated Two-dimenisional Cerium Sulfate,[C_6N_2H_(14)][Ce(SO_4)_2(H_2O)_2]·0·5SO_4·2·5H_2O

Open-framework materials are of great interestfrom both the theoretical and practical points of viewdue to their catalytic, absorbent, and ion-exchangeproperties[1]. In the past decade, the study of structur-ally and chemically diverse open framework solids hasbeen flourishing[2—7]. A large variety of silicates[2],phosphates[3]and carboxylates[4]with open-frameworkstructures have been synthesized with organic amines astemplates. Ithas also been demonstrated thatother oxy-salts such as selenat…     

Synthesis and Structure of [Er4（μ3—OH）4（Hpro）4（Pro）2（H2O）7]（ClO4）6.7H2O

1 INTRODUCTION The design and synthesis of polynuclear com- plexes have attracted chemists?attention in the contemporary chemistry, since their clusters maybe lead to novel materials with magnetic, optical, electronic and catalytic properties of the constituent metals[1～3]. It is also prevalently interesting to synthesize high-nuclearity metal complexes for their nanoscopic dimensions[3, 4]. Spectroscopic properties of the lanthanides are widely used in the study of biological systems. …     

Synthesis and Crystal Structure of Binuclear Copper （Ⅱ） Complex Containing （Dimethylaminomethyl）ferrocene

1 INTRODUCTION Transition metal complexes with ferrocene are of considerable interest in the past fifty years because of their novel structures and special properties[1, 2]. The chemistry of ferrocene and its derivatives has become richer and richer in the last decade. Many complexes containing ferrocenyl have been synthesized and characterized[3～5]. Recently we have reported the synthesis and crystal structure of dibromo[1,1?bis(diphenylphosphino)- ferrocene]cadmium (Ⅱ)[6]. Herein we…     

Synthesis and Crystal Structure of a Copper(II) Complex with a Tab-Tab Disulfide Ligand (Tab-Tab)[CuBr_4](Tab=Trimethylammoniumphenyl-4-thiolate)

1 INTRODUCTION In the past decades, metal disulphides have recei- ved much attention due to their diversity struc- tures[1~4] and applications as potential ligands for metal ions in biological system[5]. Metal disulfide compounds are usually prepared from the direct reactions of metal ions with organic disulphide[1~5], while some others are isolated from the reactions of metal salts and thiolates with the presence of certain oxidizing agents (e.g., O2, H2O2, etc.)[6, 7]. A large number o…     

Synthesis and Crystal Structure of Zn(II) Complex with Tridentate Ligand N-(2-Hydroxy-1-naphthylidene)-L-serine

1 INTRODUCTION As the basic building blocks of proteins or enzy- mes, amino acids are versatile ligands showing flexi- ble coordination modes[1]. Recently, researchers have synthesized some metal complexes with amino acids and their derivatives[2～6]. Considerable efforts have been devoted to the preparation and structure of amino acid Schiff base complexes with transition metals[6～11]. In such cases, some Zn(II) complexes have been reported. However, most of them have been carried out…     

Thermal decomposition kinetics of titanium hydride and Al alloy melt foaming process

Metal foams, now one of research foci, are a newclass of materials with low densities and novel physi-cal, mechanical, thermal, electrical and acoustic prop-erties[1—8]. Demands from high-tech make Al alloyfoam, which has much higher specific strength than ofpure Al foam, the new development focus[9—11]. Melt foaming process is one of the approaches tofabricate Al foam and Al alloy foam and their porestructure (pore diameter and porosity) has close rela-tionship with the thermal decompo…     

Crystal and Molecular Structure of N—Phenyl 1—Methoxycarbonylmethyl—3—benzyl—1,2,3,4—tetrahydro—4—oxo—1,3,2—benzodiazaphosphorin—2—thiocarboxamide 2—Oxide

1 INTRODUCTIONOrganophosphorus compounds are ubiquitous in nature and they have broad applications in the fields of agriculture and medicine. During the past two decades, (-ketophosphonates and their derivatives containing sulfur have attracted considerable attention because these compounds are endowed with special physical, chemical and pharmacological properties due to the proximity of the carbonyl and the phosphoryl groups[1～8]. In the study on new pharmacenticals and agrochemicals, th…     

Synthesis and Crystal Structure of Tri(4-(3-hydroxy2-ethyl-4-pyridinone-1-yl)-aniline Condensation Salicylaldehydato) Monohydratotricopper(II)Dimethylformamide Monohydrate Solvate

1 INTRODUCTION Synthesis of transition-metal complexes with Schiff-base has been a subject of considerable im- portance[1, 2]. These complexes are not only good coordination agents for Schiff-base, but also good bactericide and antitumour agent[3, 4]. A number of hydroxypyridinones are nontoxic compounds that have been applied in bioinorganic chemistry over many years[5], and their iron(III) complexes have been assessed for the amelioration of anaemia[6]. They have also been examined …     

Preparation and Crystal Structure of a Rare-earth Salt Based on the Decavanadate (V_(10)O_(28)~(6-)): [Y(H_2O)_8]_2[V_(10)O_(28)]·9H_2O

1INTRODUCTION Contemporary interest in polyoxovanadates re-flects not only their attractive magnetic and electro-nic properties[1~3],but also the complex structural chemistry of vanadium with a variety of coordina-tion geometries and oxidation states[4].Decavana-date is a represent of the fully oxidized isopolyva-nadates.A number of compounds have been repo-rted and characterized[5~9],but it is found now that most of these polyvanadate salts coordinated with metal cations are actually eith…     

Synthesis and Crystal Structure of a Dicopper(Ⅰ) Complex with Bis(diphenylphosphino)methane and Diethyldithiocarbamate

1 INTRODUCTION Dithiocarbamate derivatives and their metal complexes are extremely versatile compounds which have been used, for example, in the treatment of alcoholism, sarcoma cell and as possible pro- tection against the lethal effect of X-rays etc[1]. Owing to the striking structure features and diversified applications of the metal complexes with dithiocarbamate[2～6], it is of theoretical and practical significance to study the coordination chemistry much more adequately. The meta…     

Correlation of Quantitative Structure and Inhibition Phytotoxicity for Aromatic Compounds Using Ab Initio Method

1 INTRODUCTION Quantitative structure-activity relationship (QSAR) is one of the necessary methods to evaluate the ha- zards of organic chemicals. QSAR equation could be employed to forecast the biological activity of un- known compounds, which is significant for initial screening and evaluation of toxic compounds[1]. Aro- matic compounds are toxic organic compounds with relatively low water solubility, and their structure- activity relationship has been investigated with AM1 method[2]…     

Crystal and Molecular Structure of N-(1-Ethoxycarbonyl- ethyl)1-Ethoxycarbonylmethyl-3-ethyl-1,2,3,4- tetrahydro-4-oxo-1,3,2-benzodiazaphosphorin- 2-carboxamide 2-Oxide

1 INTRODUCTIONOrganophosphorus compounds are ubiquitous in nature and they have broad applications in the fields of agriculture and medicine. During the past two decades, (-ketophosphonates and their derivatives have attracted considerable attention because these compounds are endowed with special physical, chemical and pharmacological properties due to the proximity of the carbonyl and the phosphoryl groups[1～6]. For example, it is well known that phosphonoformic acid (PFA) is effectiv…     

Synthesis and crystal structure of complex of Ce(NO_3)_3 with N-(3-methyl-pyridin-2-yl)-formimidoyl-(3-methyl-pyridin-2-yl) hydrazone

Rare earth complexes with organic ligands have been used as luminescence-material usually. Except their luminescent property, the complexes of trivalent lanthanide ions have low toxicity and powerful para-magnetic properties[1,2], so the lanthanide complexes are associated with important biological uses as diag-nostic tools and medicines[36]. Recently, there are some reports on Ce(III) complexes, some of which show anti-cancer activities[7]. S- tetrazines can be used as poly-dentate chelatin…     

Synthesis and Crystal Structure of a Novel Binuclear Cu（ Ⅱ ） Complex with Tetradentate Schiff-base Ligand

1 INTRODUCTION Many metalloenzymes containing in their active sites two copper ions that operate cooperatively occur in plants and animals. They are utilized for dioxygen transport or activation, electron transfer, reduction of nitrogen oxides, and hydrolytic che- mistry[1]. Consequently binuclear copper complexes with two ions in close proximity have received a great deal of attention[2～4]. These complexes are particularly of interest in the field of biomimetic chemistry to provide impr…     

Synthesis and Crystal Structure of a New One-dimensional Double Helical-chain Polymer, {Zn（O2CC12H8CO2）（H2O）}n

1 INTRODUCTION Pronounced interest has been put in the field of coordination polymeric complexes owing to their fas- cinating molecular topologies[1～3] along with poten- tial applications as functional materials[4～6]. In par- ticular, complexes with helical structures attract much attention of scientists[7, 8] mainly due to their simi- larity to the structure of DNA molecule. To obtain new complexes, solv- and hydrothermal routes are currently used. In this way, the organic ligand act…     

Synthesis and Structural Characterization of Co(Ⅱ) Coordination Polymer [Co(-phth)(imi_)2]_n

1 INTRODUCTION The polymeric metal complexes with extended structures are of great interest because of their useful chemical or physical properties[1]. Due to the noticeable fact that the aromatic polycarboxylate can provide versatile coordination mode and the non-coplanar structure of the carboxylate groups and the benzene rings, a lot of efforts in this field have been particularly directed to the preparation of aromatic polycarboxylate (such as phthalate, tere- phthalate and isophthal…     

Synthesis, Crystal Structure and Magnetic Properties of Cobalt(II) Complex Involving Imino Nitroxide Radicals

1 INTRODUCTION The synthesis and study of transition metal com-plexes incorporating organic free radicals have arou-sed great interest in the field of molecular magne-tism[1]. Nitronyl nitroxide radicals (NITR), stable or-ganic radicals, have been widely used as molecularunits in the design and construction of magnetic ma-terials[2～5]. These radicals are especially attractivedue to that their donor atoms can assemble an exten-ded coordination geometry with changing magneticcoupling. A…     

Synthesis and Characterization of a Novel One-dimensional Metal Organic Compound

1 INTRODUCTION Metal-organic compounds with open-frameworks are of intense interest due to their potential appli- ciations in the fields of molecular sieving, optical materials, zeolitic catalyses and so forth[1～9]. Addi- tionally, their functionality can be modified by chan- ging either the inorganic species or the organic li- gands in the structures. In the past decade, one di- mensional (1-D) infinite sructure with specific topo- logies has been obtained by assembly of suitable metal …     

Synthesis and Structural Characterization of a New Cadmium(II) Complex with a Double Betaine

1 INTRODUCTION The construction of supramolecular aggregates has received much attention due to their intriguing network topologies and potential functions as new classes of materials[1, 2]. Multiple noncovalent interac- tions, such as hydrogen bonds, π-π stacking and host- guest ionic interactions, play important roles in the supramolecular assembly of metal ions and organic ligands[3, 4]. In this context the multidentate ligands with conjugated groups are employed as building blocks in…