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1.
Danuta Czakis-Sulikowska Joanna Radwańska-Doczekalska Bożena Kuźnik Anna Malinowska 《Transition Metal Chemistry》1996,21(1):19-22
Summary AgI and CuII complexes with 2,4-bipyridyl (2,4-bipy or L) with the general formulae AgL2X (where X = NO
inf3
sup–
or ClO4
-), CuL2X2·2H2O (X = Cl- or Br-), CuL4SO4·4H2O, CuL4(NO3)2·2H2O and CuL4(ClO4)2·H2O have been isolated pure and characterized by analytical, spectral and magnetic measurements. The thermal decomposition of these complexes was studied under non-isothermal conditions in air. 相似文献
2.
《Journal of Coordination Chemistry》2012,65(19):3389-3431
This review highlights some structural features and luminescent properties of homo- and hetero-multinuclear silver(I)–pyridinyl complexes. It focuses on the coordination and geometry of the silver(I) ions to the pyridinyl-nitrogen. For this reason, we have considered only pyridinyl-N–Ag(I) complexes whose crystal data are available. In addition, this review does not consider mononuclear silver(I)–pyridinyl complexes as these have been reviewed elsewhere. This is motivated by the fact that multinuclear silver(I)–pyridinyl complexes have been shown to be more stable in solution, possess enhanced properties, and have fascinating structures compared to their mononuclear counterparts. The introduction highlights pyridinyl ligands used in complexation of silver(I) ions. The main body highlights complexation of silver(I) through pyridinyl nitrogen and the interactions found in the multinuclear silver(I)–pyridinyl complexes as well as the coordination number and geometry of silver(I) centers. Though silver(I) has been flaunted to prefer linear twofold coordination geometry, from this review, it is clear that higher coordination numbers in varied geometries are possible. These include distorted trigonal planar, T-shaped, distorted tetrahedral, trigonal bipyramidal, and octahedral geometries. Coordination of silver(I) to pyridinyl ligands and their metalloligands has been observed to impart or enhance luminescent properties in the ensuing complexes. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(2):229-241
The complexes [Cu(biq)2]Cl2 and [Cu(biq)2]BF4·biq (biq?=?2,2′-biquinoline) have been prepared and characterized. The interconversion to copper(I) complex [Cu(biq)2]BF4·biq, from [Cu(biq)2]Cl2 has been established. The new complexes have been characterized by elemental analysis, conductivity and magnetic measurements, IR, UV-vis and 1H- and 13C-NMR spectroscopy. The X-ray analysis of the complex [Cu(biq)2]BF4·biq supports the assumption of the interconversion of copper(II) to copper(I) in this case. The crystal structure shows that geometry around the metal is severely distorted from Td, and displays many supramolecular motifs incorporating both hydrophobic (aryl···aryl) and hydrophilic (C–H···F) intermolecular interactions. The microbiological activity of the complexes against bacteria and fungi was found to be high against Candida albicans, and slight to moderate against bacteria. The antimicrobial activity of [Cu(biq)2]BF4·biq was slightly better than that observed for [Cu(biq)2]Cl2 against both bacteria and fungi. 相似文献
4.
《Journal of organometallic chemistry》1971,27(3):421-426
The cyclic allenes, 1,2,6-cyclononatriene, 1,2,6-cyclodecatriene and 1,2,6,-cyclodecatetraene form well-defined crystalline π-complexes with silver(I) nitrate and copper(I) chloride. The IR spectra of these complexes show two new bands between 1650 and 1900 cm−1 in place of the single allenic band around 1950 cm−1 present in the non-coordinated allenes. 相似文献
5.
Béziau A Baudron SA Hosseini MW 《Dalton transactions (Cambridge, England : 2003)》2012,41(24):7227-7234
Using ligands based on either an acetylacetonate or a dipyrrin moiety appended with pyridyl groups, a series of novel heteroleptic copper(II) and cobalt(III) complexes combining both chelate units such as (acacpy(2))Cu(dpm-py) and (acacpy(2))Co(dpm-py)(2) (acacpy(2) = 1,3-bis(4-pyridyl)-1,3-propanedionate; dpm-py = 5-(4-pyridyl)dipyrrin) have been prepared and fully characterized. These two complexes were obtained upon reaction of dpm-py with the (acacpy(2))M homoleptic species (M = Cu(II), Co(II)). In the solid state, the (acacpy(2))Cu(dpm-py) complex behaves as a self-complementary metallatecton and leads to the formation of a 1D coordination polymer (CP) through the coordination of a peripheral pyridyl group to the copper centre. Contrastingly, the octahedral (acacpy(2))Co(dpm-py)(2) complex featuring a coordinatively saturated Co(III) centre crystallizes as an isolated mononuclear species. In order to generate heterometallic CPs, both complexes have been used as metallatectons upon their combination with different silver(I) salts. Upon reaction of (acacpy(2))Cu(dpm-py) with Ag(BF(4)) or Ag(TfO), 2- and 3-D heterometallic networks were obtained, respectively. In both cases, sheet type arrangements resulting from the binding of Ag(+) cations by three peripheral pyridyl groups were observed. These 2D sheets are further interconnected through Ag-π interactions with the pyrrolic rings. Under the same conditions, the combination of (acacpy(2))Co(dpm-py)(2) with Ag(TfO) leads to two networks differing by their connectivity patterns and dimensionality. Interestingly, whereas no Ag-π interactions were observed for the 2D network, a combination of coordination bonding with the pyridyl moieties and Ag-π interactions was detected for the 1D architecture. 相似文献
6.
《Journal of Coordination Chemistry》2012,65(14):2365-2376
The pseudo-tetrahedral complexes [CuL2]PF6·7H2O·CH3OH (1) and [AgL2]CF3SO3·H2O (2) (L?=?3,3′-bis(2-benzimidazolyl)-2,2′-bipyridine) have been synthesized and characterized through crystal structure analyses, electrochemistry, and spectroscopic methods. X-ray structural analyses of 1 and 2 indicate that sterically constrained N4 ligands L are cis and behave as bidentate chelates to a single metal ion in a pseudo-tetrahedral fashion through the benzimidazole. As two benzimidazolyl rings exhibit considerable steric hindrance, the bipyridine unit of L remains uncoordinated. The pseudo-tetrahedral cation [CuL2]+ shows a quasi-reversible CuI/CuII oxidation–reduction wave in the CV in DMF (counter-ion PF6?). The fluorescence titration of L with copper(I), silver(I), and also with pH have been conducted to examine the selectivity. The ligand shows remarkably high selectivity and sensitivity for Ag(I). 相似文献
7.
《Journal of Inorganic and Nuclear Chemistry》1974,36(9):1951-1957
The treatment of Cu(I)ClO4 with heterocyclic amines leads to the formation of complexes in which copper is tetra-, tri- and dicoordinated. Evidence that precludes coordination by perchlorate and confirms that the trisamine copper(I) complex contains triligated copper, is presented. I.R. results suggest that the formally dicoordinated complexes in fact possess a higher coordination number in the solid, due to the formation of π-complexes, metal clusters or electron deficient bonds. The overall coordination number of copper(I) in each complex is shown to be a function of the basicity and the steric requirements of the ligands and determines the resistance to air oxidation of copper(I). Unexpectedly, for a d10 ion, several complexes show apparent magnetic moments which are quite large. 相似文献
8.
9.
New dinuclear and polynuclear Ag(I) complexes with the formula of [Ag2(sac)2(pen)2] (1) and [Ag2(sac)2(nmen)]n (2), (sac = saccharinate, pen = 1,3-diaminopropane, nmen = N-methylethylenediamine) have been synthesized and characterized by IR spectroscopy and thermal (TG/DTG, DTA) analysis. In addition, their structures were determined by single crystal X-ray diffraction technique. In 1, Ag(I) ions are doubly bridged by two pen ligands, besides pen ligands exhibit an interesting coordination mode by binding bridging ligand. Sac ligands connect to silver atom through its imino N atom. Furthermore, each Ag(I) ion exhibits a T-shaped coordination geometry. In 2, Ag(I) coordination environment is again T-shaped, including weak Ag-Ag bonds. The sac exhibits bidentate bringing mode, involving its imino nitrogen and carbonyl oxygen atoms, besides, bridging of Ag(I) centres by sac ligands results in argentophilic contacts. The polymeric units are assembled into two-dimensional networks by hydrogen bonds, C-H?π stacking interactions, weak Ag?Csac (η2) and Ag?O interactions. 相似文献
10.
《Journal of Inorganic and Nuclear Chemistry》1975,37(10):2081-2086
The inert cations that accompany the anionic dithiolato complexes, Ni(L)22−(L = S2C2(CN)2, S2C:C(CN)2, S2C:NCN, S2C:C(COOCH3)2, S2C:C(COOC2H5)2, and S2C:N(C6H5) are readily replaced by the coordinately unsaturated M′(P(C6H5)3)2+ (M′ = Ag(I), Cu(I)) complex cations. The i.r. spectra of the crystalline polynuclear complexes Ni(L)2[(P(C6H5)3)nM′]2 (n = 2 or 3) thus obtained indicate that the anion-cation interactions occur primarily through the mercapto groups. In the Ni(S2C:N(C6H5))2[P(C6H5)3)3Cu]2 complex the copper is coordinated to the carbimate nitrogen of the ligand. Interactions of Cu(P(C6H5)3)2+ with the Ni(S2C2(CN)2)2 −2 and Ni(S2C:C(CN)2)22− complexes appear to occur with the π-system of the nitrile groups of the complex ligands. Dinuclear complexes of the composition [M′(P(C6H5)3)2]2L also were obtained and their structures and properties are discussed. 相似文献
11.
《Journal of Inorganic and Nuclear Chemistry》1966,28(10):2201-2203
The tetra-β and γ-picoline complexes of silver (II) have been prepared by peroxydisulphate oxidation of aqueous solutions of silver nitrate in the presence of the nitrogen heterocyclic ligands and isolated as the peroxydisulphate salts. No evidence for an α-picoline complex was found. The spectral and magnetic properties of the picoline complexes have been compared with the square planar pyridine compound Ag(py)4S2O8. 相似文献
12.
《Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy》1976,32(2):285-289
Some copper (I) and silver (I) complexes with dithiomalonamide (Hdtma), NN′-dimethyl-(HMe2dtma) and NN′-diphenyl-dithiomalonamide (HPh2dtma) were prepared: Cu(Hdtma)X (X2 = Cl, Br, I(H2O), ClO4); Cu(HL)2X (HMe2dtma: X = Cl, Br, I, ClO4; HPh2dtma: X = Cl, Br, I); Ag(HL)X (Hdtma: X = Cl; HMe2dtma: X = Br, ClO4, BF4; HPh2dtma: X = Br, I); Ag2(HL)3X2 (Hdtma: X = ClO4, BF4; HMe2dtma: X = Cl; HPh2-dtma: X = Cl, ClO4); Ag2(HMe2dtma)I2 and Ag3(Hdtma)2Br3. Molar conductivities in DMF show that the complexes behave: M2(HL)3(ClO4)2 as 1:2 electrolytes, M(HL) (ClO4 of BF4) as 1:1 electrolytes; those of the halides Cu(HL)X and Cu(HL)2X, are almost equal and intermediate between values for non-electrolytes and 1:1 electrolites. Infrared spectra indicate an S,N-coordination for all the complexes: ν(MN) bands in the region of 400–500 cm−1 and ν(MS) bands in the region of 300–400 cm−1 (for Hdtma), 300–320 cm−1 (for HMe2dtma) and 260–280 cm−1 (for HPh2dtma) are observed. No ν(MX) bands were identified in the halide complexes indicating that a mental—halide coordination, if present in the solid complexes, should be very weak. 相似文献
13.
《Journal of Inorganic and Nuclear Chemistry》1975,37(12):2439-2442
Methylenebisthiopropionic acid, CH2(S. CH2. CH2. COOH)2, form stable complexes, with cobalt(II), nickel(II) and copper(II), of the type ML.XH2O (M = Metal, L = Ligand, X = 2 for cobalt(II) and nickel(II) and X = 0 for copper(II)). Their structures have been characterised on the basis of elemental analysis, magnetic moment, electronic and i.r. spectral studies. Cobalt(II) and nickel(II) form high-spin octahedral complexes and the copper(II) forms a distorted octahedral complex. I.R. spectra shows that coordination takes place through both sulphur and carboxylate groups of the ligand. Relevant ligand field parameters have been reported for these complexes. The nephelauxetic effect seems to be more effective for cobalt(II) than nickel(II). 相似文献
14.
Tarafder Md. Tofazzal H. Saravanan N. Crouse Karen A. Ali Abdul Manaf b. 《Transition Metal Chemistry》2001,26(6):613-618
A bidentate and a quadridentate Schiff base having NS and NNSS donor sequences were prepared by condensing S-benzyldithiocarbazate (NH2NHCSSCH2Ph) with 2,3-butanedione (1:1 and 1:2 mole ratio). NiII and CuII complexes of these ligands were studied and characterised by elemental analyses and various physico-chemical techniques. The nickel complexes, [Ni(NS)2] and [Ni(SNNS)], were diamagnetic with square-planar and five-coordinate structures, respectively. The copper complex was, however, pentacoordinated. The ligands and the complexes were screened for anticancer activity against T-lymphoblastic leukemic cells (CEM-SS) and colon cancer cells (HT-29). The NS Schiff base was strongly active against leukemic cells with a CD50 value of 2.05 g cm–3. The nickel and copper complexes were found to be stronger antioxidants than Vitamin E. 相似文献
15.
《Journal of Coordination Chemistry》2012,65(6):691-698
Two cyano-bridged copper(II)–copper(I) mixed-valence assemblies, Cu(EAM)2[Cu(CN)2]2 1 (EAM?=?ethanolamine) and Cu(DETA)[Cu(CN)2]2·0.5H2O 2 (DETA?=?diethylenetriamine), have been prepared and structurally and magnetically characterized. IR spectra indicate the presence of bridging cyano groups in both 1 and 2, confirmed by structure analyses; Cu(I)–CN–Cu(II), Cu(I)–CN–Cu(I) and Cu(I)–Cu(I) metal bond linkages are evident. In the lattice, a 3D network is formed by two [Cu(CN)2]?? units and one [Cu(EAM)2]2+unit for 1. Variable temperature magnetic susceptibilities, measured in the 5–300?K range, indicate weak antiferromagnetic exchange interactions in complex 1. 相似文献
16.
The mechanisms of magnetic exchange interactions in two heterobridged mu-hydroxyl-mu-X dicopper complexes A and B (X = azaindole for A and X = pyrazole for B) are investigated by the calculations based on density functional theory combined with the broken-symmetry approach (DFT-BS). It is found that although the coordination circumstances of the copper centers in the two complexes are very similar, the magnetic magnitudes and signs are diametrically opposed. By the theoretical analyses of magnetic orbital interaction and spin distribution, it is indicated that the difference between the magnetic properties of the two complexes is due to the distinction of orbital interaction of two bridge ligands. Namely, the weak ferromagnetic coupling for complex A arises from the orbital countercomplementarity of the hydroxo and azaindole bridges while the strong antiferromagnetic coupling for complex B arises from the orbital complementarity of the hydroxo and pyrazolato bridges. 相似文献
17.
In order to rationalize the effect of the size and coordinating ability of counteranions upon the structure of Ag(I)–dithioether coordination polymers, a series of such polymers has been synthesized by the combination of the 1,3-bis(methylthio)propane building block and AgX silver salts (X = ClO4− (1), BF4− (2), CF3SO3− (3), SbF6− (4), C6H5COO− (5), CF3COO− (6), CF3CF2CF2COO− (7) and −OOCCF2CF2COO− (8)). Except in two cases, all complexes form 1D-coordination polymers. 相似文献
18.
19.
Shape-persistent macrocycles and planar organometallic complexes are beginning to show considerable promise as building blocks for the self-assembly of a variety of supramolecular materials including nanofibers, nanowires, and liquid crystals. Here we report the synthesis and characterization of a family of planar di- and tri-silver(I) containing metallo-macrocycles designed to self-assemble into novel metal-organic nanotubes through a combination of π-stacking and metal-metal interactions. The silver(I) complexes have been fully characterized by elemental analysis, high resolution electrospray ionization mass spectrometry (HR-ESI-MS), IR, (1)H and (13)C NMR spectroscopy, and the solution data are consistent with the formation of the metallo-macrocycles. Four of the complexes have been structurally characterized using X-ray crystallography. However, only the di-silver(I) complex formed with 1,3-bis(pyridin-3-ylethynyl)benzene is found to maintain its macrocyclic structure in the solid state. The di-silver(I) shape-persistent macrocycle assembles into a nanoporous chicken-wire like structure, and ClO(4)(-) anions and disordered H(2)O molecules fill the pores. The silver(I) complexes of 2,6-bis(pyridin-3-ylethynyl)pyridine and 1,4-di(3-pyridyl)buta-1,3-diyne ring-open and crystallize as non-porous coordination polymers. 相似文献
20.
《Journal of Inorganic and Nuclear Chemistry》1974,36(6):1259-1264
Trinuclear dimethylglyoximato copper(II) complexes, Cu3(DMG)2Cl4, Cu3(DMG)2Br4, 4H2O and [Cu(DMG)2]2Cu(NO3)2 and an acetylacetonedioximato complex Cu3(AADO)2Cl2,2H2O have been isolated. Investigations by i.r. and visible spectrophotometry revealed that both nitrogen and oxygen atoms of the oxime groups are coordinated in the halide complexes and a higher degree of conjugation occurs in the trinuclear complexes. For the nitrate complex, [Cu(DMG)2]2Cu(NO3)2 i.r. spectra show the presence of hydrogen bonded (OH) bands as in Cu(DMG)2 and splitting occurs for the vibrational bands of (NO) groups. The structure involves the coordination of cis oxygen atoms of NO groups on one side of each of two Cu(DMG)2 to a third copper(II) ion, while on the other side of Cu(DMG)2 the hydrogen bonded structure remains intact.The magnetic susceptibility of the four trinuclear compounds has been measured from ambient to 90°K in temperature. The results demonstrate antiferromagnetic exchange between one cupric ion and its neighbour on each side with no interaction between the latter. 相似文献