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1.
《Journal of Coordination Chemistry》2012,65(14):2377-2392
Two copper(II) complexes, [Cu(L)2](ClO4)2] and [Cu(L)(bipy)](ClO4)2, were prepared and characterized by the spectroscopic and analytic methods, where L is N-butylbenzimidazole and bipy is 2,2′-bipyridine. Single crystals of [Cu(L)(bipy)](ClO4)2 suitable for X-ray diffraction study were obtained by slow diffusion of diethyl ether into a DMF solution of the complex and the complex was found to crystallize as [Cu(L)(bipy)](ClO4)2·DMF. The asymmetric unit contains one [Cu(L)(bipy)]2+, two uncoordinated perchlorates, and one DMF solvate. Coordination geometry around Cu(II) is distorted square pyramidal with τ value of 0.31. Thermal properties of the complexes were examined by thermogravimetric analysis, indicating that the complexes are thermally stable to 310?°C. The metal complexes were screened for their in vitro antibacterial and antifungal activities Bacillus subtilis and Bacillus cereus (as Gram(+) bacteria), Escherichia coli, Enterobacter aerogenes, and Klebsiella pneumoniae (as Gram(–) bacteria), and Saccharomyces cerevisiae, Candida utilis, and Candida albicans (as yeasts). The complexes show antibacterial and antifungal activities against bacteria and yeasts. 相似文献
2.
Ryo Horikoshi 《Journal of organometallic chemistry》2005,690(7):1793-1799
5-Ferrocenylpyrimidine (FcPM) reacts with dinuclear copper(II) carboxylates ([Cu2(RCOO)4]; R = C6H5, C5H11, CH3) to produce one-dimensional coordination polymers [Cu2(C6H5COO)4(FcPM)]n (1), [Cu2(C5H11COO)4(FcPM)]n · nCH3CN (2), and a discrete tetranuclear complex [Cu2(CH3COO)4(FcPM)2] (3). Compounds 1 and 2 show similar zigzag chain structures, comprising alternate linking of FcPM and dinuclear copper(II) units, whereas the structure of 3 corresponds to the local structural motifs of 1 and 2. Reaction of FcPM with zinc salts (ZnX2; X = NO3, SCN) affords zinc-centered ferrocenyl cluster complexes, [Zn(NO3)2(FcPM)3] (4) and [Zn(SCN)2(FcPM)2] · 0.5H2O (5), with varying M:L ratios. FcPM acts as a bidentate ligand in 1 and 2, and as a monodentate ligand in the others. 相似文献
3.
Jing-Yun Wu Hui-Fang Chen Yu-Chen Jao Sheng-Ming Huang Tien-Wen Tseng Shie-Ming Peng 《Journal of solid state chemistry》2011,184(7):1740-1748
Two Cd(HBimc)-based isomers, [Cd(HBimcN)(HBimcT)(H2O)]·3.5H2O·EtOH (1a·3.5H2O·EtOH, H2Bimc=1H-benzimidazole-5-carboxylic acid) and [Cd(HBimcN)(HBimcT)(H2O)] (1b), and two Cu(HMBimc)-based coordination polymers, [Cu(HMBimcN)2(H2O)]·1/2H2O (2·1/2H2O, H2MBimc=2-methyl-1H-benzimidazole-5-carboxylic acid) and [Cu(HMBimcT)2]·2THF·H2O (3·2THF·H2O), were self-assembled from Cd(ClO4)2·6H2O/H2Bimc and Cu(ClO4)2·6H2O/H2MBimc systems, respectively. Compound 1a adopts a ladder-like chain structure, comprised of a hydrogen-bond-stabilized Cd2(HBimcN)2-metallocyclic stair and a 1D straight -(Cd-HBimcT)n- edge, whereas compound 1b exhibits a 2D (4,4)-rhombus layered structure, intercrossed by 1D -(Cd-HBimcN)n- chains and -(Cd-HBimcT)n- chains. Compound 2 shows a 1D double-stranded wave-like chain from two single-stranded wave-like -(Cu-HMBimcN)n- chains and compound 3 adopts a 2D (4,4)-topological layer structure, intercrossed by subunits of 1D -(Cu-HMBimcT)n- chains. Interestingly, a pair of tautomeric HBimc building blocks—normal (N or HBimcN) and tautomer (T or HBimcT)—is simultaneously included in the structures of 1a and 1b, whilst the N- and T-configured HMBimc building blocks are present as separate entities in Cu species, 2 and 3, respectively. The existence of only a tautomer (T) mode of the benzimidazolecarboxylate-based ligand in a Cu(II) network is observed for the first time. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(21):2351-2359
Two new usymmetric bidentate Schiff-base ligands (2-pyridyl-2-furylmethyl)imine (L1) and (2-pyridyl-phenylmethyl)imine (L2) were prepared. The crystal structures of two chloro-bridged complexes [Cu2(μ-Cl)2(L1)2Cl2] (1) and [Mn (μ-Cl)2(L2)] (2) derived from the each ligand have been confirmed by single-crystal X-ray diffraction analysis. The complexes were characterized by IR, elemental analysis and spectroscopic methods. In complex 1, the two copper atoms are five-coordinate involving a square-pyramidal geometry having a N2Cl3 donor set with the two chlorine atoms bridging the two copper atoms. In complex 2, the manganese atoms are both six-coordinate. In contrast to 1, all chlorine atoms in 2 are bridging chlorides and link adjacent manganese atoms together forming 1-D infinite chains. 相似文献
5.
YANG Rui-Na XUE Bao-Yu WANG Dong-Mei JIN Dou-Man Henan Institute of Chemistry Zhengzhou Henan ChinaCHEN Jun LI Ming-Xing Department of Chemistry Fudan University Shanghai China 《中国化学》1997,15(1):76-83
At room temperature, dibenzoyl peroxide undergoes oxidative addition reaction with metallic copper powder and pyridine N-oxide (triphenylphosphine oxide or 2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolin) which affords the last products as binuclear copper(II) complexes, [Cu(C5H5NO)-(C6H5COO)2]2(1), [Cu(OPPh3)(C6H5COO)2]2(2) and [Cu(C6H5COO)(C26H2oN2)](3, C26H2oN2 is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolin). The structure of the complexes were characterized by elemental analyses, IR spectra, TG-DTA and magnetic property. Crystals(1) are triclinic, space group P1,a=0.92617(36),b=1.06973(17), c=1.08813(29) nm, a=59.60(2)°, β=74.83(3)°,γ=72.80(2)°, V=0.880 nm3, Dc=1.520 g/cm3, Z=1, R=0.044, Rw=0.048, Mr=805.78, 3477 reflections with I > 3σ(I). Each copper(Ⅱ) ion is coordinated by two bridging bidentate benzoate ligands and one pyridine N-oxide or triphenylphosphine oxide to form dimeric binuclear molecules. The structure of the compound(1) shows a clear centre of symmetry. 相似文献
6.
Synthesis and crystal structure of bis(m-hydroxybenzoato(1-))bis(benzimidazole) copper(II) dihydrate
《Journal of Coordination Chemistry》2012,65(7):629-636
The crystal structure of the title complex was determined by single-crystal X-ray diffraction methods. The unit cell contains two independent molecules, A and B. B is a mononuclear Cu(II) complex with square-planar coordination geometry formed by two benzimidazole molecules and two hydroxylbenzoate anions. A is a dimer of B, formed by bridging hydroxybenzoate, and copper assumes square-pyramidal geometry. Aromatic π–π stacking is observed between parallel benzimidazole rings of neighboring A molecules. IR spectra of the compound are assigned in line with the crystal structure. 相似文献
7.
Four new copper(II) complexes of the composition [Cu(H2L)(H2O)] have been synthesized by template method from reaction of copper(II) acetate, succinoyldihydrazine and some o-hydroxy aromatic aldehydes and ketones in aqueous methanol media. The composition of the complexes has been established on the basis of data obtained from analytical and mass spectral studies. The structure of the complexes has been discussed in the light of molar conductance, magnetic moment, Uv-vis, EPR and IR spectral studies. All of the complexes are non-electrolyte in DMSO. The μeff values for the complexes fall in the region 1.76–1.85 BM which rules out the possibility of any M–M interaction in the structural unit of the complexes. The ligands coordinate to the metal centre in enol form through phenolate/naphtholate oxygen atoms and azomethine nitrogen atoms. The NMR spectra show that ligands are present in anti-cis configuration in uncoordinated state. In all of the complexes the copper centre adopts square pyramidal stereochemistry. The unpaired electron is present in orbital in the ground state for copper centre in the complexes. The electron transfer reactions for the complexes have been studied by cyclic voltammetry. 相似文献
8.
Michael R Eberhard Shiro Matsukawa Craig M Jensen 《Journal of organometallic chemistry》2003,687(1):185-189
Synthetic routes towards novel PCP′ pincer ligands were devised. Ligand 1-(Pr2iPOCH2)-3-(Bu2tPCH2)(C6H4) is prepared in a three step synthesis from 1,3-benzenedimethanol and 1-(Pr2iPO)-3-(Bu2tPCH2)(C6H4) is accessible in three steps from 3-hydroxybenzylalcohol. Both their palladium(II) complexes are prepared in good yields but are distinctly different since [PdCl{(C6H3)(OPPr2i)-2-(CH2PBu2t)-6}] possesses two five-membered palladacycles, whereas [PdCl{(C6H3)(CH2PBu2t)-2-(CH2OPPr2i)-6}] is unusual for a pincer complex in that it contains both five- and six-membered palladacycles. Both compounds also represent the first examples of pincer complexes where one donor is a phosphinite and the other is a phosphine. The X-ray structures of these complexes were solved and are discussed. The data reveal that an increase in the metallacycle ring-size leads to changes in bond lengths, but more importantly to significant increases in the bond angles. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(14):2288-2295
Two phthalate structures and a copper coordination polymer, (phth)2(H2O)2 (1), (phth)2(H2O)3 (2), and Cu(phth)2(H2O)2 (3) [phth = phthalate], have been synthesized hydrothermally. The complexes were studied by single crystal X-ray analysis, elemental analysis, IR spectra and TG-DTG. Single crystal X-ray analysis reveals that 1 belongs to the orthorhombic system, space group Pca2(1), 2 is the monoclinic system, space group C2/c and 3 has four-coordinate Cu(II). The copper complex forms a one-dimensional zigzag chain via π–π stacking interaction of phthalates. Adjacent zigzag chains may be paired by supramolecular recognition and attraction through both π–π stacking and hydrogen bonding interactions into molecular zippers, further interlinked into a three-dimensional supramolecular network by these noncovalent interactions. 相似文献
10.
《Journal of Coordination Chemistry》2012,65(10):1711-1719
Two picolinate-containing nickel(II) complexes [Ni(bbma)(pic)(H2O)]ClO4 · CH3OH (1) and [Ni(ntb)(pic)]Cl · CH3OH · 3H2O (2) were synthesized and characterized by infrared, elemental analysis, UV-Vis, and X-ray diffraction analyses, where bbma is bis(benzimidazol-2-yl-methyl)amine, ntb is tris(2-benzimidazolylmethyl)amine, pic is the anion of picolinic acid. X-ray analysis shows that both complexes are mononuclear with picolinate coordinated to Ni(II) in a μ2-N,O chelating mode. Both complexes adopt distorted octahedral geometry. Intermolecular N–H ··· O and O–H ··· O hydrogen bonds and π–π interactions in 1 and 2 are important in stabilization of the crystal structures. 相似文献
11.
Suning Wang 《Journal of Cluster Science》1995,6(4):463-484
Copper complexes with aminoalcoholato ligands have attracted much attention recently because of their potential applications in ceramic materials. This review deals with polynuclear copper (II) complexes containing bidentate and triden-tate aminoalcoholato ligands. The focus of this article is on the synthesis, structure, and magnetic properties of polynuclear copper (II) complexes obtained recently by our group. Some relevant work reported previously by other researchers is also included.Dedicated to Professor Jiaxi Lu on the occasion of his 80th birthday. 相似文献
12.
Three novel Cd(II) coordination polymers, {[Cd(C4BIm)(N3)(OAc)]·C2H5OH}n (1), [Cd(C4BIm)(H2O)3(SO4)]n (2) (C4BIm = 1,4-bis(benzimidazolyl)butane) and [Cd(bbbm)1.5(NO3)2]n (3) (bbbm = 1,1′-(1,4-butanediy)bis-1H-benzimidazole) have been prepared and characterized spectroscopically and crystallographically. In polymer 1, C4BIm–Cd chains and N3–Cd chains criss-cross to a layer structure. Polymer 2 possesses a concave–convex chain structure. Polymer 3 exhibits a two-dimensional (2-D) rhomboid grid network, the dimensions of the grid is 25.807 × 13.771 Å, and the diagonal-to-diagonal distances are 28.608 × 21.145 Å. The fluorescence properties and the thermal stabilities of the three polymers were investigated. 相似文献
13.
Chiral C2-symmetric bis(imidazoline) pincer ligands 2a-d have been synthesized for the first time. Direct cycloplatination of these ligands with K2PtCl4 in dry acetic acid afforded the corresponding cycloplatinated pincer complexes 3a-d. The X-ray single-crystal structure of platinum complex 3d and the preliminary studies on the photoluminescent properties of 3 are reported. 相似文献
14.
Rui Feng Fang-Fang Huang Jia-Li Yuan Zheng Lu Tao Fang & Feng-Mei Nie 《Journal of Coordination Chemistry》2016,69(24):3776-3791
Five picolinato zinc(II) and cadmium(II) complexes, [Zn(ntb)(pic)]ClO4·CH3OH·2H2O (1), [Zn(bbma)(pic)]NO3·2CH3OH (2), [Cd(ntb)(pic)]ClO4·0.75CH3OH·H2O (3), [Cd2(bbma)2(pic)2](ClO4)2 (4), and [Cd2(bbp)(bbp-H)(pic)2(C2H5OH)]ClO4 (5), have been synthesized, where pic is the anion of picolinic acid, ntb is tris(2-benzimidazolylmethyl)amine, bbma is bis(benzimidazol-2-yl-methyl)amine, and bbp is 2,6-bis(benzimidazol-2-yl)pyridine. All the complexes were characterized by X-ray single-crystal diffraction, elemental analysis, IR, fluorescence spectroscopy, and thermal gravimetric analysis. 1–3 are mononuclear complexes in which picolinate adopts a N,O-chelating mode. 4 is a symmetrical dinuclear complex bridged by two anti-parallel picolinates in a N,O,O-coordination mode. 5 is also a dinuclear complex in which only one picolinate is a bridge. A 1-D double chain is formed by extensive H-bonds and π–π stacking in 1, while single zigzag chains are formed in 5. Complexes 2–4 all exhibit 63-hcb 2-D frameworks. They extend to form four-connected 66-dia 3-D topological nets for 2 and 4 and five-connected 46·64-bnn 3-D topological nets for 3. The five complexes show emission maxima in the blue region in the solid state. 相似文献
15.
16.
Urmila Pal Chaudhuri Lei Yang Laura R. Whiteaker Arunendu Mondal Matthew R. Fultz Douglas R. Powell Robert P. Houser 《Polyhedron》2007,26(18):5420-5431
Mononuclear copper(II) complexes of a family of pyridylmethylamide ligands HL, HLMe, HLPh, HLMe3 and HLPh3, [HL = N-(2-pyridylmethyl)acetamide; HLMe = N-(2-pyridylmethyl)propionamide; HLPh = 2-phenyl-N-(2-pyridylmethyl)acetamide; HLMe3 = 2,2-dimethyl-N-(2-pyridylmethyl)propionamide; HLPh3 = 2,2,2-triphenyl-N-(2-pyridylmethyl)acetamide], were synthesized and characterized. The reaction of copper(II) salts with the pyridylmethylamide ligands yields complexes [Cu(HL)2(OTf)2] (1), [Cu(HLMe)2](ClO4)2 (2), [Cu(HL)2Cl]2[CuCl4] (3), [Cu(HLMe3)2(THF)](OTf)2 (4), [Cu(HLMe3)2(H2O)](ClO4)2 (5a and 5b), [Cu(HLPh3)2(H2O)](ClO4)2 (6), [Cu(HL)(2,2′-bipy)(H2O)](ClO4)2 (7), and [Cu(HLPh)(2,2′-bipy)(H2O)](ClO4)2 (8). All complexes were fully characterized, and the X-ray structures vary from four-coordinate square-planar, to five-coordinate square-pyramidal or trigonal-bipyramidal. The neutral ligands coordinate via the pyridyl N atom and carbonyl O atom in a bidentate fashion. The spectroscopic properties are typical of mononuclear copper(II) species with similar ligand sets, and are consistent their X-ray structures. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(8):1212-1220
An asymmetric bidentate Schiff-base ligand (2-hydroxybenzyl-2-furylmethyl)imine (L–OH) was prepared. Three complexes derived from L–OH were synthesized by treating an ethanolic solution of the appropriate ligand with an equimolar amount of metallic salt. Three complexes, Cu2(L–O?)2Cl2 (1), Ni(L–O?)2 (2) and Co(L–O?)3 (3), have been structurally characterized through elemental analysis, IR, UV spectra and thermogravimetric analysis. Single crystal X-ray diffraction shows metal ions and ligands reacted with different proportions 1?:?1, 1?:?2 and 1?:?3, respectively, so copper(II), nickel(II), and cobalt(III) have different geometries. 相似文献
18.
Jorge PasánJoaquín Sanchiz Francesc LloretMiguel Julve Catalina Ruiz-Pérez 《Polyhedron》2011,30(15):2451-2458
The use as coligands of the nicotinamide (nia) and isonicotinamide (inia) molecules in the complex formation between copper(II) and phenylmalonate [Phmal = dianion of phenylmalonic acid] yielded the compounds of formula [Cu(inia)(Phmal)(H2O)] (1) and [Cu(inia)(Phmal)(H2O)]n (2). Although single crystals of 1 of appropriate size were grown, their unresolved twinning and space group ambiguity prevented a satisfactory X-ray structure determination. The crystal structure 2 consists of corrugated layers of copper(II) ions with intralayer carboxylate-phenylmalonate bridges in the anti-syn (equatorial-apical) coordination mode. A water molecule and the isonicotinamide group are coordinated to the copper atom in trans position being located above and below each layer. The Phmal ligand adopts the bidentate/monodentate coordination mode with the bidentate coordination involving one equatorial and one apical bonds, a feature which is unprecedented for the copper(II) complexes with alkyl(aryl)substituted-malonate derivatives. Intra- and interlayer H-bonds together with intralayer π-π type interactions between the phenyl and inia aromatic groups contribute to the stabilization of the three-dimensional supramolecular structure. Magnetic susceptibility measurements of complexes 1 and 2 in the temperature range 1.9-300 K are quasi identical and they correspond to a very weak ferromagnetic interaction between the copper(II) ions [J = +0.091(2) cm−1 (1) and +0.097(2) cm−1 (2) through the spin Hamiltonian for an isotropic square grid of interacting spin doublets which is defined as H = −JΣiSi · Si+1]. The strong similarity in the magnetic properties of 1 and 2 allow us to conclude that although they are not isostructural species, their structures have to be very close. 相似文献
19.
20.
《Journal of Coordination Chemistry》2012,65(4):640-650
Some new unsymmetrical tetradentate Schiff-base ligands, (N-salicylidene-N′-pyrrolidene)-1,2-ethylenediamine(H2salpyren) (H2L1), (H2Mesalpyren) (H2L2), (H2phsalpyren) (H2L3), (N-salicylidene-N′-pyrrolidene)-1,3-propylenediamine (H2salpyrpd) (H2L4), (H2Mesalpyrpd) (H2L5), (H2phsalpyrpd) (H2L6) and their Ni(II) and Cu(II) complexes were synthesized and characterized by elemental analyses, IR, UV-Vis, 1H NMR and mass spectra and magnetic moments. Possible structures of these complexes have been proposed. The thermodynamic formation constants of the complexes were determined spectrophotometrically at constant ionic strength 0.1?M (NaClO4), at 25°C in methanol. 相似文献