两个基于四面体型配体的镉配合物的合成、晶体结构及性质

用四面体构型的配体四[3-(羧基苯)氧甲基]甲烷(H₄L)与镉离子通过溶剂热法合成了结构不同的配合物[Cd₆L₃(DMA)₃(H₂O)]_n(1)和{[Cd₂L(H₂O)₄]·4H₂O}_n(2)(L=四[3-(羧基苯)氧甲基]甲烷)。化合物1属于三方晶系R3空间群。每个配体通过4个羧基连接了4个三核镉簇,每个三核镉簇连接了6个苯甲酸,形成双节点(4,6)-连接toc拓扑构型的三维骨架结构。配合物2属于单斜晶系C2/c空间群。每个配体连接了4个镉原子,仍保持四面体构型。镉原子由羧基沿着b轴连接成一维链,链与链之间通过配体连接,且2个相邻配体的苯环之间存在π-π堆积。此外,对化合物1和2在室温下做了固态紫外和荧光性质的研究。     

两个基于四面体型配体的镉配合物的合成、晶体结构及性质

用四面体构型的配体四[3-(羧基苯)氧甲基]甲烷(H₄L)与镉离子通过溶剂热法合成了结构不同的配合物[Cd₆L₃(DMA)₃(H₂O)]_n (1)和{[Cd₂L(H₂O)₄]·4H₂O}_n (2)(L=四[3-(羧基苯)氧甲基]甲烷)。化合物1属于三方晶系R3 空间群。每个配体通过4个羧基连接了4个三核镉簇, 每个三核镉簇连接了6个苯甲酸, 形成双节点(4, 6)-连接toc拓扑构型的三维骨架结构。配合物2属于单斜晶系C2/c空间群。每个配体连接了4个镉原子, 仍保持四面体构型。镉原子由羧基沿着b轴连接成一维链, 链与链之间通过配体连接, 且2个相邻配体的苯环之间存在π-π堆积。此外, 对化合物1和2在室温下做了固态紫外和荧光性质的研究。     

基于配合物配体策略的Cu-Cd异核配位聚合物的合成与晶体结构

利用小分子配合物[Cu(2-mpac)₂(H₂O)]•3H₂O (1)作为配合物配体, 以其两侧未配位的羰基氧原子与金属配位合成了一个Cu-Cd异核配位聚合物[Cu(2-mpac)₂(H₂O)₂Cd(H₂O)₄(NO₃)₂]_n (2) (2-mpac＝5-methyl-2-pyrazinecarboxylic acid), 并利用元素分析、红外光谱以及X射线单晶衍射法对标题化合物进行了表征. 晶体学数据: 三斜晶系, P-1空间群, a＝0.7654(7) nm, b＝0.8903(8) nm, c＝0.9745(9) nm, α＝116.116(1)°, β＝98.408(1)°, γ＝90.335(1)°, V＝0.5880(9) nm³, Z＝1, S＝1.053, 最终残差因子[I＞2σ(I)] R₁＝0.0280, wR₂＝0.0718, 对于全部数据R₁＝0.0305, wR₂＝0.0741.     

混合配体构筑的Cd~(2+)配合物的合成及其晶体结构

通过溶剂热技术,制得一种新型的Cd~(2+)配合物[Cd(L)_2(ba)_2]_2(1,L=4'-(4-甲基苯)-4,2':6',4″-三联吡啶,Hba=苯甲酸),其结构经IR,元素分析和单晶射线衍射表征。1属单斜晶系,空间群为P2_1/c,晶胞参数a=1.095 5(2)nm,b=1.404 1(3)nm,c=3.045 5(8)nm,β=103.37(3)°,V=4 557.6(18)3,D_c=1.459g·cm~(-3),Z=2,R_1=0.045 5,wR_2=0.094 0[I2σ(I)]。结构分析表明:1为零维双核结构,通过π…π堆积作用拓展为二维层状超分子。     

A New Dinuclear Cu(Ⅱ) Complex of a Ligand with Benzimidazole Group─Synthesis and Crystal Structure

A new dinuclear copper complex, [Cu(C9H11N3)Cl2]2 (C18H22Cl4Cu2N6), has been synthe- sized and characterized by X-ray structure determination. It crystallizes in the triclinic P1 space group with a = 7.526(3), b = 9.473(4), c = 9.535(3) , α = 117.214(10), β = 108.251(9), γ = 91.560(6)o, V = 562.3(4) 3, Z = 1, Mr = 591.30, F(000) = 298, Dc = 1.746 g/cm3, μ(MoKα) = 2.385 mm-1, the final R = 0.0577 and wR = 0.1248 for 2188 unique reflections with 1629 observed ones (I > 2σ(I)). In the title complex, each copper(II) atom is located at the center of a distorted trigonal bipyramid of five coordination atoms (two nitrogen and three chlorine atoms). Two copper(II) atoms were bridged by two chlorine anions (Cl(2) and Cl(2a)) to form a Cu(II)-Cu(II) binuclear entity with the distance between two copper(II) atoms of 3.398 .     

Synthesis and Crystal Structure of a New 2D Honeycomb-like Cadmium(II) Complex with Tripodal Ligand

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Synthesis and Crystal Structure of a New Silver(I) Complex

The reaction of 4-amino-6-methyl-1,2,4-triazine-3(2 H)-thione-5-one (AMTTO) with silver(I) nitrate in methanol gives the complex [Ag(AMTTO)₂]NO₃ ( 1 ). 1 was characterized by IR and ¹³C NMR spectroscopy and by an X-ray structure analysis [space group C2/c, Z = 4, lattice dimensions at –80 °C: a = 1306.7(2), b = 1139.0(2), c = 1089.2(1) pm, β = 94.54(1)°, R₁ = 0.0294]. The cation possesses a highly distorted linear coordination sphere in the solid state.     

Synthesis and Crystal Structure of a Co(II) Complex with Schiff Base and Imidazole Ligand

1 INTRODUCTION The chemical behavior of metal complexes with Schiff base ligand has attracted much attention be- cause of their catalytic activity in some industrial[1, 2] and biochemical processes[3~5]. As some metal com- plexes have shown the catalytic activity in some polymerization reactions[2, 6], we are recently inte- rested in polymerizartion of organo-silicon com- pounds catalyzed by Schiff base complexes of tran- sition metals. A series of Schiff base complexes have been prepare…     

Synthesis and Crystal Structure of a New Lanthanum(III) 4-Cyanobenzoate Complex

A new dinuclear La(III) complex [La2(4-cba)4[H(4-cba)2]2(phen)2(H2O)4] (4-Hcba = 4-cyanobenzoic acid and phen = 1,10-phenanthroline) 1 has been synthesized by solvothermal reaction in an ethanol/water mixed solution at 100 ℃ and structurally characterized by single- crystal X-ray diffraction. Crystallographic data: C88H58La2N12O20, Mr = 1881.28, triclinic P1, a = 7.518(3), b = 17.033(6), c = 17.551(6), α = 115.333(4), β = 92.9910(10), γ = 99.366(5)°, V = 1985.3(12)3, Z = 1, Dc = 1.574 g/cm3, F(000) = 944 μ = 1.145 mm–1, the final R = 0.0281 and wR = 0.0686 for 6708 reflections with I > 2σ(I). In 1, two nine-coordinated La(III) ions are connected by two 4-cba ligands in a syn-syn bidentate coordination mode, and the other six 4-cba ligands terminate the La(III) ions, resulting in an isolated dinuclear structure. Two different types of intramolecular hydrogen bonds, asymmetrical O-H…O and symmetrical O…H…O, exist in the crystal. The title complex molecules are connected through hydrogen bonds and weak π-π stacking interactions to generate a 2-D layered network. The thermogravimetric analysis of 1 has also been discussed.     

含吡嗪甲酸配体的双核铬配合物的水热合成、晶体结构及荧光性质

通过水热法合成了1个双核铬配合物[Cr2(OH)2(2-pca)4].3H2O(2-Hpca=2-吡嗪甲酸),并对其进行了X-射线单晶衍射、红外光谱、元素分析、荧光和热的表征及研究。该配合物属于单斜晶系,P21/c空间群。晶体学数据:a=1.566 35(15),b=0.847 70(6),c=1.974 60(18)nm,β=90.645 0(10)°,C20H20Cr2N8O13,Mr=684.44,V=2.621 7(4)nm3,Dc=1.734 g.cm-3,F(000)=1 392,μ=0.913 cm-1,Z=4,最终R=0.044 7,wR=0.112 0用于3 251个可观测点。在晶体结构中,每个铬原子均为六配位,其中来自两分子2-吡嗪甲酸的2个氮原子、2个羧酸基氧原子和2个桥连羟基上的氧原子,呈现畸变的八面体几何构型。     

Synthesis, Crystal Structure and Photoluminescent Property of a Novel Disilver Complex with Pyrazinyl Oxime Ligand

<正>A novel binuclear Ag(I) complex [Ag_2(C_6H_6N_3O)_2(C_6H_7N_3O)_2]·2CH_3CN (1) was synthesized by the evaporation reaction of silver nitrate and (E)-1-(pyrazin-2-yl)ethanone oxime (HL). The complex was characterized by elemental analysis, IR spectrum and X-ray single-crystal diffraction analysis. It crystallizes in the monoclinic space group C2/c with a = 22.7089(3), b = 11.5443(7), c = 16.1468(4) , β = 127.7150(10)°, V = 3348.6(2) ~3, D_c = 1.675 g/cm~3, M_r = 844.42, Z = 4, F(000) = 1696.0, μ = 1.226 mm~(-1), the final R =0.0250 and wR = 0.070. The coordination around the silver(I) atom is a distorted trigonal-bipyramidal geometry involving one protonated pyrazinyl oxime ligand (HL), one deprotonated oxime ligand (L~-) and one CH_3CN solvate molecule in the asymmetric unit of complex 1.     

Synthesis and Crystal Structure of a Copper(Ⅱ) Complex with 2,4-Dihydroxybenzylidene Benzoylhydrazone Ligand

A new copper(Ⅱ) complex with formula CuL(py), where L2- is the dianion of 2,4-dihydroxybenzylidene benzoylhydrazone, has been synthesized and characterized by IR spectra and single-crystal X-ray diffraction method. The crystal belongs to monoclinic, space group P21/c with a = 0.9630(4), b = 1.4808(6), c = 1.2320(5) nm, β= 104.969(6)°, V= 1.6973(11)nm3, Z = 4, Dc = 1.553 g/cm3, μ(MoKa) = 1.311 mm-1, F(000) = 812, R = 0.0694 and wR = 0.1727 for 1511 observed reflections (I ＞ 2σ(Ⅰ)). The crystal structure analysis indicates that the copper(Ⅱ) ion lies in a distorted square-planar environment composed of two oxygen atoms, one nitrogen atom from the tridentate acylhydrazone Schiff base ligand L2- and one nitrogen atom teractions to form dimers, which are further linked to generate a two-dimensional layer structure via interdimeric hydrogen bonds.     

Synthesis and Crystal Structure of a Novel Tetranuclear Manganese(II) Complex with a Tripodal Peptide Ligand

1 INTRODUCTION Amides play an important role in the evolution ofnature. The amidate participates in the coordinationof iron with the ligands containing biomolecules, suchas antitumor drug bleomycin[1] and nitrile hydra-tase[2]. Bleomycin is a clinically useful antitumoragent which catalyzes the cleavage of oxidative DNAand oxidizes a number of organic substrates with di-oxygen or H2O2 . This has raised more interest in [3]the coordination of amide complexes[4, . …     

Synthesis and Crystal Structure of a Copper(II) Complex with 2,4-Dihydroxybenzylidene Benzoylhydrazone Ligand

1 INTRODUCTION The chemical properties of acylhydrazones Schiff bases and their complexes with some transition metal ions have been intensively investigated in several re- search areas because of their chelating capability and pharmacological applications[1～10]. Intriguingly, the copper(II) complexes are shown to be signifycantly more potent than the metal free chelate, suggesting that the metal complex is the biologically active species. Owing to the biological interest in these types …     

Synthesis and Crystal Structure of a Novel 3D Magnesium(II) Coordination Polymer Constructed by Flexible Benzene-1,4-dioxyacetate

1 INTRODUCTION The coordination chemistry of the alkaline-earth metals has remained a largely underdeveloped area[1, 2]to date. Also calcium(II) and magnesium(II) ions are the essentially biological elements and play an im- portant role in DNA and protein syntheses. Although the transition metal carboxylates have been widely in- vestigated[3, 4], the reports on magnesium complexes with carboxylate ligands are very rare[5]. The flexible phenylenedioxydiacetic acids (BDOAH2), especial…     

Synthesis and Crystal Structure of a Novel 3D Magnesium(Ⅱ) Coordination Polymer Constructed by Flexible Benzene-1,4-dioxyacetate

A novel coordination polymer of [Mg(1,4-BDOA)(CH3OH)2]n (1,4-BDOA2- = benzene-1,4-dioxyacetate dianion) has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystal crystallizes in monoclinic system, space group P21/c, with a = 12.070(2), b = 7.7088(15), c = 7.3332(15) (A),β = 91.42(3)o, V = 682.1(2) (A)3, Z = 2, Mr = 312.56, Dc = 1.522 g/cm3, μ = 0.168 mm-1, F(000) = 328, the final R = 0.0628 and wR = 0.1591 for 1082 observed reflections with I > 2σ(Ⅰ). The Mg(Ⅱ) atom and 1,4-BDOA2- ligand lie in different inversion centers. The Mg(Ⅱ) atom shows an octahedral geometry defined by four carboxyl O atoms from four different 1,4-BDOA2- ligands and two hydroxyl O atoms from two methanol molecules. The Mg(Ⅱ) atoms are bridged by 1,4-BDOA2- ligands, leading to a 3D infinite network structure.     

Synthesis and Crystal Structure of a New 2D Honeycomb—like Cadmium （Ⅱ） Complex with Tripodal Ligand

A new cadmium (II) coordination polymer, [Cd(TTTMB)₂]‐(SO₄) · 21H₂O, where TTTMB =1,3, 5‐tris (imidazol‐1‐yl‐methyl)‐2,4,6‐trimethylbenzene, was obtained by self‐assembly of tripodal ligand TTTMB with CdSO₄·2.7H₂O in acetonitrile, and characterized by X‐ray crystallography. The crystal data belongs to monoclinic space group C_c with cell parameters a = 1.16891(4) nm, b=2.06671(6) nm, c = 2.48185(7) nm, β = 97.8560(10)°, R = 0.0487, wR = 0.1211. The results of structure analysis indicate that each TTTMB ligand coordinates three metal atoms and in turn each Cd(II) atom with octahedral coordination geometry connects six nitrogen atoms of imidazole group from six different TTTMB ligands to produce a 2D honeycomb network structure. There are a lot of water molecules linked by hydrogen bonds and occupied the channels formed intra‐ and inter‐sheets.     

以环已二酸及咪唑基化合物为配体的镉配合物的合成、晶体结构及荧光性质

以硝酸镉、环已二酸(H₂CDC)和2,3,5,6-四氟-1,4-二咪唑基二甲苯(FBIX)为原料,在水热条件下得到了1个配位聚合物[Cd(CDC)(FBIX)_0.5]_n(1),并利用元素分析、红外光谱以及X-射线单晶洐射对其进行了表征。该晶体属三斜晶系,P1 空间群,a=0.880 53(18) nm,b=0.888 31(18) nm,c=1.091 7(2) nm,α=97.349(2)°,β=95.688(2)°,γ=105.495(2)°,V=0.808 1(3) nm³,D_c=1.799 g·cm^-3,Z=2,F(000)=434,Goof=1.094,R₁=0.025 6,wR₂=0.072 3。Cd(Ⅱ)离子通过2个CDC配体桥联形成一维双绞链,再通过FBIX配体连接成二维层状结构。室温下该配合物表现出较强的荧光发射。     

Synthesis,Crystal Structure,and Magnetic Properties of a New Dinuclear Iron Complex with Schiff Base Ligand

A new dinuclear iron(Ⅲ) complex has been synthesized and structurally characterized by X-ray crystallography: [FeⅢ2(L)(C6H5COO)(SO4)(CH3OH)2]·CH3CN·CH3OH(1, H3 L = N,N'-bis(salicylidene)-1,3-diamino-2-propanol). Complex 1 belongs to orthorhombic space group Pna21 with a = 11.4400(8), b = 22.9705(2), c = 12.5712(9) , V = 3303.5(4) 3, Z = 4, F(000) = 1576, Dc = 1.531 g·cm–3, Mr = 761.36, μ = 1.007 mm–1, S = 1.014, the final R = 0.0505 and wR = 0.1018. The crystal packing is stabilized by intermolecular O–H···O hydrogen bonds, forming an extended one-dimensional chain structure. The temperature dependence of magnetic susceptibility measurement shows that antiferromagnetic interaction is propagated between the metal centers. Fit as dinuclear arrangement gave parameters of J = 19.7 cm-1, g = 1.89 and R2 = 0.9999.     

Synthesis and Crystal Structure of a New Mononuclear Copper Complex

<正>A new kind of Cu (II) complex [Cu(tpmb)2Cl2]·CH3OH·H2O (tpmb = 1,3,5-tri(2-pyrimidinyl)sulfanylmethyl-2,4,6-trimethylbenzene) was synthesized, and its structure has been determined by X-ray single-crystal diffraction. It crystallizes in the triclinic, space group P 1 with a = 8.8397(2), b = 13.327(3), c = 13.926(3) A, α = 63.27(3), β = 86.96(3), r = 80.68(3)°, V = 1445.6(5) A3, C49H51Cl2CuN12O2S6, Mr= 1166.82,Z=1, F(000) = 604, Dc = 1.340 g/cm3, μ = 0.735 mm-1, R = 0.0545 and wR = 0.1575 for 4521 observed reflections (I > 2σ(I)). X-ray analysis reveals that the Cu (II) ion is coordinated by two Cl- anions and two nitrogen atoms from different pyrimidine groups, forming a square structure.