Synthesis, Structure and Magnetic Properties of Two New Homotrinuclear Bis(oxamato) Copper(II) Complexes

ＩｎｔｒｏｄｕｃｔｉｏｎＭｏｌｅｃｕｌａｒｍａｇｎｅｔｉｓｍｏｆｐｏｌｙｎｕｃｌｅａｒｃｏｍｐｌｅｘｅｓｉｓｏｆｃｏｎｓｉｄｅｒａｂｌｅｉｎｔｅｒｅｓｔｆｏｒｄｅｓｉｇｎｉｎｇｎｅｗｍａｇｎｅｔｉｃｍａｔｅｒｉａｌｓａｎｄｆｏｒｉｎｖｅｓｔｉｇａｔｉｎｇｔｈｅｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｔｈｅｓｔｒｕｃｔｕｒｅａｎｄｔｈｅｒｏｌｅｏｆｔｈｅｐｏｌｙｍｅｔａｌｌｉｃａｃｔｉｖｅｓｉｔｅｓｉｎｂｉｏｌｏｇｉｃａｌｓｙｓｔｅｍｓ.1 4 Ｊｏｕｒｎａｕｘｅｔａｌ .5ｈａｖｅｒｅｃｅｎｔｌｙｐｒｏｐ…     

Synthesis, Structure and Magnetic Properties of a Diphenoxo-bridged Binuclear Copper(II) Complex

ＩｎｔｒｏｄｕｃｔｉｏｎＥｘｃｈａｎｇｅ ｃｏｕｐｌｅｄｐｏｌｙｎｕｃｌｅａｒｃｏｐｐｅｒ(ＩＩ)ｃｏｍｐｌｅｘ ｅｓａｒｅｏｆｓｐｅｃｉａｌｉｎｔｅｒｅｓｔｄｕｅｔｏｔｈｅｉｒｉｎｖｏｌｖｅｍｅｎｔｉｎｂｉｏ ｌｏｇｉｃａｌｐｒｏｃｅｓｓｅｓａｎｄｉｎｉｎｏｒｇａｎｉｃｍａｔｅｒｉａｌｓ .1,2 Ｔｈｅｉｎｔｉ ｍａｔｅｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｔｈｅｓｐｉｎｃｏｕｐｌｉｎｇａｎｄｔｈｅｍｏｌｅｃｕｌａｒｓｔｒｕｃｔｕｒｅｈａｓｆｏｓｔｅｒｅｄｔｈｅｅｍｅｒｇｅｎｃｅｏｆｍｏｌｅｃ ｕｌａｒ…     

Synthesis, Structure and Magnetic Properties of Novel Carboxylato-bridged Pentanuclear Copper(Ⅱ)-Lanthanoid(Ⅲ) Complexes

ＩｎｔｒｏｄｕｃｔｉｏｎＰｏｌｙｎｕｃｌｅａｒｍｉｘｅｄ－ｍｅｔａｌｃｏｍｐｌｅｘｅｓｃｏｎｔａｉｎｉｎｇｂｏｔｈｔｒａｎｓｉｔｉｏｎａｎｄｌａｎｔｈａｎｏｉｄｍｅｔａｌｉｏｎｓａｒｅｏｆｓｐｅｃｉａｌｃｕｒｅｎｔｉｎｔｅｒｅｓｔｉｎｒｅｌａｔｉｏｎ...     

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 Magnetic Properties of Fe(II) and Nd(III) Complexes of Poly(N-2-thiazolylacrylamide)

In recent years,the organic ferromagnets have drawn growing attention due to their characteristics of structural diversities,low density,and readily processing1-3.Design and synthesis of magnetic polymers are one of great challenges in today′s magnetic material research,and some significant achievements have been made in this field4,5.In this article,we describe the synthesis of acrylamide-type polymer with pendent thiazolyl groups(Scheme1).The as-prepared polymer exhibited better solubility …     

Crystal Structures and Magnetic Properties of Cu(II) Complexes with Pyrazole‐Substituted Iminonitroxyl Radicals: New Trinuclear Heterospin Complexes

The paper describes the crystal structures and magnetic properties of complexes of copper(II) hexafluoroacetate (Cu(hfac)₂) with stable pyrazolesubstituted iminonitroxyl radicals containing the pyrazole substitutuent in the second position of the 2imidazoline cycle (L). A new group of [Cu(hfac)₂]₃(L)₂ complexes is found, in which L performs a bidentatebridge function due to the coordination of the imine N atoms of the pyrazole and imidazoline cycles. It is shown that in the solid complexes there are Cu²⁺—N = C—N—O exchange routes with highenergy ferromagnetic interactions (60–100 cm^-1).     

Synthesis, Crystal Structure, Properties and Thermoanalysis of Complexes of Cu(II) and Ni(II) with Taurine-5-chlorosalicylaldelyde Schiff Base

Introduction The complexes of amino acid Schiff base have re-ceived considerable attention because of the interests in the biogical field.1-4 Taurine is a special amino acid in human beings. Recently, the complexes of taurine con-densation salicylaldelyde Schiff base have been re-ported,3-7 but the complexes of taurine condensation derived salicylaldelyde Schiff base have not been re-ported yet. In order to examine its anticancer and antibiosis ac-tivity of the complexes of taurine condensa…     

Cu(II) Complexes with Optically Active α-Alkylamino Oximes of Caryophyllene Type: Synthesis,Structure, and Properties

Paramagnetic complexes Cu(HL¹)Cl₂ (I), Cu(HL²)Cl₂ · 2H₂O (II), and Cu(HL¹)Br₂ (III) are synthesized by the reaction of copper(II) halides with the optically active -alkylamino oximes HL¹ and HL² of caryophyllene type. Crystal and molecular structures of complex I are determined. The crystals are orthorhombic: a = 9.038(2) Å, b = 11.990(2) Å, c = 11.990(2) Å, V = 2004.8(7) ų, space group P2₁2₁2₁, Z = 4, (calcd) = 1.812 g/cm³, R ₁ = 0.0632. In a mononuclear complex I, the coordination polyhedron of CuCl₂N₂ is a distorted square. The structures of complexes II and III are suggested on the basis of EPR, IR and Raman spectroscopy data.     

A Double Crown Hexakis[(Di-μ-benzylthio)Nickel]Cluster:Synthesis,Structure and Properties

The double crown hexakis[(di-μ-benzylthio)nickel]cluster,[Ni6(SCH2C6H5)12]·C2H5OH,was obtained by reacting C6H5CH2SNa with[(CH3)2CHOCS2]2Ni in EtOH.The results ...     

Synthesis, Structure and Properties of Tetrakis (thiourea) mercury (II) Tetrakis (thiocyanato-N) zinc (II)

Introduction In recent years, much attention has been paid to the research of novel, high-quality nonlinear optical (NLO) crystals, especially those metalorganic complex crystals that can generate high efficient second-harmonic blue-violet light using GaAlAs laser diodes. In order to find this type of crystals, much work has been done in our laboratory on the complex crystals of MM'(SCN)4 and MM'(SCN)·nL, where M = Zn, Cd, Mn; M' = Cd, Hg and L = adduct1-6. A 404.5nm blue-violet lig…     

Synthesis,Structure and Reactivity of Lanthanocene Complexes

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｃｈｅｍｉｓｔｒｙｏｆｏｒｇａｎｏｌａｎｔｈａｎｉｄｅｓｈａｓｅｘｐｅｒｉｅｎｃｅｄｅｘｔｒｅｍｅｌｙｉｍｐｏｒｔａｎｔｄｅｖｅｌｏｐｍｅｎｔｓｄｕｒｉｎｇｔｈｅｌａｓｔｔｗｏｄｅｃａｄｅｓ ,ａｎｄｎｕｍｅｒｏｕｓｕｎｕｓｕａｌｃｏｍｐｏｕｎｄｓｗｉｔｈｕｎｐｒｅｃｅ ｄｅｎｔｅｄｓｔｒｕｃｔｕｒｅｓａｎｄｕｎｉｑｕｅｒｅａｃｔｉｖｉｔｙｐａｔｔｅｒｎｓｈａｖｅｂｅｅｎｐｒｅｐａｒｅｄ .1ＯｒｇａｎｏｌａｎｔｈａｎｉｄｅｃｏｍｐｏｕｎｄｓｃｏｎｔａｉｎｉｎｇＬｎ—Ｃ ,…     

Synthesis,Structure, and Magnetic Properties of a New 2D Cobalt(Ⅱ) Metal-organic Framework

Rational design of magnetic materials with desired magnetic properties has attracted wide interest in recent decades. Herein, we present a new 2D cobalt(II) metal-organic framework, namely [Co(MQ)_2(V_2O_6)_2]n·4nH_2O 1, which was hydrothermally synthesized by the reaction of Co(NO_3)_2·4H_2O, N-methyl-4,4′-bipyridinium(MQ+) chlorine salt and NH_4VO_3. Single-crystal X-ray diffraction analysis reveals that 1 crystallizes in C2/c space group with a = 16.290(5), b = 7.815(2), c = 25.297(7) ?, β = 108.459(5)°, V = 3054.8(15) ?~3, Z = 4, D_c = 1.890 g/cm~3, μ = 1.791 mm~(-1), F(000) = 1748, the final R = 0.0444 and wR = 0.1208 with I 2σ(I). The individual Co(II) is connected and well separated by diamagnetic [V_2O_6]_2-linkers. Magnetic measurements confirm that 1 exhibits ferrimagnetic interactions.     

Synthesis, Crystal Structure and Magnetic Properties of a New Zn(Ⅱ)-Nitronyl Nitroxide Complex

A new complex [Zn(NIT-1'-MeBzIm)Cl2(H2O)] (NIT-1'-MeBzIm = 2-{2'-[(1'-methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-l-oxyl-3-oxide) has been prepared and structurally characterized by X-ray diffraction method. Crystal data: monoclinic, space group P21/n, Z = 4, C15H21Cl2N4O3Zn, Mr = 441.63, a = 7.2225(10), b = 30.849(4), c = 8.8758(13) (A), β= 103.904(2)°, V = 1919.6(5) A3, Dc = 1.528 g/cm3, μ(MoKα) = 1.579 mm-1, F(000) = 908, R = 0.0436 and wR = 0.1029 for 2456 observed reflections with Ⅰ> 2σ(Ⅰ). X-ray analysis reveals that the Zn(Ⅱ) ion is four-coordinated with a distorted tetrahedron. There also exist H-bonds, π-π piling interactions and weak intermolecular contacts between the NO groups which form a mutual stagger 3-D network configuration. Magnetic investigation reveals that there exists intermolecular antiferro- and ferromagnetic interactions in the title complex.     

Synthesis and Characterization of 2,6-Bis(imino)phenoxy Cobalt Complexes

ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｃｅｎｔｒｅｓｅａｒｃｈｅｆｆｏｒｔｓｈａｖｅｂｅｅｎｄｅｖｏｔｅｄｔｏｔｈｅｓｔｕｄｙｏｆｌａｔｅｔｒａｎｓｉｔｉｏｎｍｅｔａｌｃｏｍｐｌｅｘｅｓａｓｍｏｄｅｌｓｙｓｔｅｍｓｆｏｒｔｈｅｐｏｌｙｍｅｒｉｚａｔｉｏｎｏｒｏｌｉｇｏｍｅｒｉｚａｔｉｏｎｏｆｅｔｈｙｌｅｎｅ .1 3ＴｈｅｍｏｓｔｎｏｔａｂｌｅａｃｈｉｅｖｅｍｅｎｔｓｈａｖｅｂｅｅｎｄｏｎｅｂｙＢｒｏｏｋｈａｒｔ,4 Ｂｅｎｎｅｔｔ,5ａｎｄＧｉｂｓｏｎｇｒｏｕｐｓ .6,7Ｔｈｅｙｉｎｄｅ ｐｅｎｄｅｎｔｌｙｒｅｐｏｒ…     

Synthesis,Crystal and Molecular Structure of Mono- and Diaquadi(acetato-O)-Bis(2,4′-Bipyridyl) Copper(II)

The title compound has been synthesized and characterized by elemental analysis and conductivity studies. The crystal and molecular structure has been determined. There are two different types of molecules in the crystal: mono- and diaquadi(acetato-O)-bis(2,4'-bipyridyl) copper (II). Both copper atoms occupy special positions. The copper atoms show almost ideal square pyramidal (4 + 1) and square bipyramidal (4 + 2) coordination. Due to the Jahn-Teller effect, the axial Cu-O(water) bond distances are longer than respective equatorial Cu-O(acetate) bond distances. The bond valences of the copper were computed. An intramolecular strong hydrogen bond linking O(water) and O(acetate) atoms exists in the molecule. The differences of geometrical environment for copper in mono- and diaquadi(acetato-O)-bis(2,4'-bipyridyl) copper(II) are imposed by strong intermolecular hydrogen bonds creating a linear infinite chain structure along crystallographic x axis. Also weak intramolecular hydrogen bonds are present in the molecule.     

Hydrothermal Synthesis,Crystal Structure and Magnetic Properties of a Cobalt(II) Coordination Polymer Assembled by 4-Sulfophthalate and 4,4'-Bipyridine

1 INTRUDUCTION The rational design and synthesis of metal-direc- ted supramolecular framework have received much attention in coordination chemistry because of their potential applications in catalysis, molecular selec- tion, non-linear optics, ion exchange and microelec- tronics[1～4]. During the lastdecade, many high-di- mensional coordination complexes have been de- signed and prepared through molecular self-as- sembly process[5～10]. The construction of open metal organic framework, s…     

Synthesis,Physicochemical Properties,and Structure of Heterocyclic β-Aminovinyl Ketones and Related Copper(II) Complex

Heterocyclic -aminovinyl ketones (HL) and the copper complex CuL₂ are synthesized and studied by IR and ¹H NMR spectroscopies. The crystal structure of one of the tautomeric HL molecules is determined by X-ray diffraction analysis. The crystals are triclinic: a = 9.261(6) Å, b = 9.448(6) Å, c = 11.310(5) Å, = 96.74(5)°, = 99.46(5)°, = 93.60(5)°, space group P . The compound has the form of a ketoamine tautomer. The structure contains intramolecular and intermolecular hydrogen bonds. The latter link the molecules into the center-symmetric dimers.     

Micro-vial Synthesis,Structure,Magnetic Properties and Hirshfeld Surface Analysis of a Penta-nuclear Fe(Ⅲ) Cluster

A new penta-nuclear Fe^Ⅲ cluster,[HN(C2H5)3]·[Fe5(timb)4(ATZ)4(μ3-O)2]·(H2O)5(1),(H2timb is 4-bromo-2-[(1H-tetrazol-5-ylimino)-methyl]-phenol;HATZ is 5-amino-1,2,3,4-tetrazole),was synthesized through micro-vial synthesis methods,which was characterized by elemental analysis,FT-IR spectra,X-ray single-crystal diffraction,thermogravimetric analysis.The single crystal belongs to the tetragonal system,space group √42d with a=0.19735(1),b=0.19735(1),c=0.26118(2)nm,Mr=1904.04,V=10.1724(10)nm^3,Z=4,Dc=1.118 g/cm^3,F(000)=3356,μ=2.314 mm^–1,R=0.0500 and wR=0.1151.The magnetic properties and Hirshfeld surface analysis of 1 were investigated and discussed in detail.     

Synthesis of New Ruthenium(II) Bipyridyl Complexes and Studies on Their Photophysical and Photoelectrochemical Properties

IntroductionDye sensitizedsolarcells (DSSC)havebecomethefocusofmanyinvestigationssinceMichaelGr tzelandco workersmadethedyemoleculesadsorbedonaporousnet workoftheinterconnectednanometer sizedcrystallinesofawidebandgapsemiconductor.1 3Animpressivesolar to electricalenergyconversionefficiencyof 10 %hasbeenre portedanditmakespracticalapplicationfeasible .4 Thissystemconsistsofadye coatedsemiconductorelectrodeandacounterelectrodearrangedinasandwichconfigura tionandtheinter electrodespaceisfilled…