共查询到20条相似文献,搜索用时 15 毫秒
1.
Radka Křikavová Ján Vančo Tomáš Šilha Jaromír Marek 《Journal of Coordination Chemistry》2016,69(16):2422-2436
Platinum(II) complexes, [Pt(Lx)X2] (1–6), where X = Br or I and Lx = 2,2′-bipyridine or 1,10-phenanthroline derivatives (5,5′-dimethyl-2,2′-bipyridine (5-Mebpy), 4,4′-dimethyl-2,2′-bipyridine (4-Mebpy), and 5-amino-1,10-phenanthroline (5-NH2phen)) were prepared. The complexes were characterized by the elemental analysis, mass spectrometry, infrared, and multinuclear (1H, 13C and 195Pt) 1-D and 2-D NMR spectroscopies, and by single-crystal X-ray analysis of [Pt(4-Mebpy)I2] (4). All the platinum(II) complexes (1–6) were evaluated for in vitro cytotoxicity against human cancer cell lines A2780 and A2780R, and against non-malignant MRC5 cell line. All the complexes were nontoxic up to the 50 μM concentration, although they were found to readily bind to calf-thymus DNA (CT-DNA), as determined by spectrophotometric titration (Kb ≈ 107 M?1) and ethidium bromide displacement assay. 相似文献
2.
Kyle N. W. Rozic Mahmood Azizpoor Fard Bahareh Khalili Najafabadi John F. Corrigan 《无机化学与普通化学杂志》2017,643(15):973-979
The manganese(II)‐palladium(II)‐sulfide complex [MnCl2(μ3‐S)2Pd2(dppp)2] ( 2 ) was prepared from the reaction of [PdCl2(dppp)] with [Li(N,N'‐tmeda)]2[Mn(SSiMe3)4] ( 2 ) in a 2:1 ratio under mild conditions. The new trimethylsilylthiolate complex [Pd(dppp)(SSiMe3)2] ( 3 ) was synthesized from the reaction of [Pd(dppp)(OAc)2] with two equivalents of Li[SSiMe3]; this was then used in a reaction with [Mn(CH3CN)2(OTf)2] to form the manganese(II)‐palladium(II)‐sulfide cluster [Mn(OTf)(thf)2(μ3‐S)2Pd2(dppp)2]OTf ( 4 ). 相似文献
3.
《Journal of organometallic chemistry》1994,481(2):173-178
bis(alkoxycarbonyl) complexes of platinum of the type [Pt(COOR)2L] [L = 1,2-bis(diphenylphosphino)ethane (dppe), 1,3-bis(diphenylphosphino)propane (dppp), l,4-bis(diphenylphosphino)butane (dppb), 1,1'-bis(diphenylphosphino)ferrocene (dppf) or 1,2-bis-(diphenylphosphino)benzene (dpb); R = CH3, C6H5 or C2H5] were obtained by reaction of [PtCl2L] with carbon monoxide and alkoxides. Palladium and nickel complexes gave only carbonyl complexes of the type [M(CO)L] or [M(CO)2L]. The new complexes were characterized by chemical and spectroscopic means. The X-ray structure of [Pt(COOCH3)2(dppf] · CH3OH is also reported. The reactivity of some alkoxycarbonyl complexes was also investigated. 相似文献
4.
S. Nasser Ostad Anita Abedi Vahid Amani Parto Karimi Shahrzad Heydarnezhad 《Journal of the Iranian Chemical Society》2016,13(8):1417-1427
Three new zinc(II) complexes of [Zn(6-mbipy)(η2-NO3)2] (1), [Zn(6,6′-dmbipy)(η2-NO3)2] (2) and [Zn(5,5′-dmbipy)(η2–NO3)(H2O)2](NO3).H2O (3) were prepared from the reaction of 6-methyl-2,2′-bipyridine (6-mbipy), 6,6′-dimethyl-2,2′-bipyridine (6,6′-dmbipy) and 5,5′-dimethyl-2,2′-bipyridine (5,5′-dmbipy) with Zn(NO3)2·4H2O in methanol, respectively. These three complexes were thoroughly characterized by elemental analysis, thermal gravimetric analysis, differential thermal analysis, infrared, UV–Vis, 1H NMR and 13C{1H} NMR spectroscopy, and their structures have all been determined by the single-crystal X-ray diffraction. The luminescence spectra of the title complexes show that the intensity of their emission bands is stronger than the bands for the free ligands. 相似文献
5.
《Journal of Coordination Chemistry》2012,65(17):3012-3021
Two substituted 2,2′-bipyridine lead(II) complexes, [Pb(5,5′-dm-2,2′-bpy)(tfac)2] n (1) (5,5′-dm-2,2′-bpy?=?5,5′-dimethyl-2,2′-bipyridine and tfac?=?trifluoroacetate) and [Pb2(4,4′-dmo-2,2′-bpy)2(ftfa)4] (2) (4,4′-dmo-2,2′-bpy?=?4,4′-dimethoxy-2,2′-bipyridine and ftfa?=?furoyltrifluoroacetonate), have been synthesized and characterized by elemental analysis, IR, 1H NMR, and 13C NMR spectroscopies, thermal behavior, and X-ray crystallography. Complexes 1 and 2 are 1D coordination polymer and dinuclear complex, respectively. The supramolecular features in these complexes are guided by weak directional intermolecular interactions. 相似文献
6.
Anna Uhrinová Juraj Kuchár Alžbeta Orendáčová Michal Pitoňák Jozef Federič Jozef Noga 《Journal of Coordination Chemistry》2017,70(17):2999-3018
[Ni(bpy)(mal)(H2O)3]·H2O and [Ni(4,4′-dmbpy)(mal)(H2O)3]·1.5H2O (mal = maleato; bpy = 2,2′-bipyridine; 4,4′-dmbpy = 4,4′-dimethyl-2,2′-bipyridine) exhibit molecular crystal structures. The Ni(II) central ions in both complexes are six-coordinate by one chelate bonded L–L ligand, three aqua ligands, and one position is occupied by a maleato oxygen donor atom. Hydrogen bonded ribbon-like supramolecular structural motifs are present in both studied complexes; these are linked by weaker C–H?O hydrogen bonds in [Ni(bpy)(mal)(H2O)3]·H2O, whereas in [Ni(4,4′-dmbpy)(mal)(H2O)3]·1,5H2O the hydrogen bonded ribbons are linked by O?H-O-H?O hydrogen bonds with the participation of the additional water solvate molecule positioned on the twofold axis. In both structures, π–π stacking interactions with different patterns in respective structures were found. The role of dispersion energy and many-body effects in the stabilization of bpy and 4,4′-dmbpy stacking interactions were investigated using methods of computational chemistry. Those confirm the dispersion-dominated stabilization of the 4,4′-dmbpy supramolecular chain-like structure, with only marginal impact of cooperativity effects. Thermal decompositions of both complexes start with dehydration. Magnetic susceptibility studies performed from 2 to 300 K revealed a dominant effect of the zero-field splitting of the Ni(II) ion, governing the low-temperature magnetic properties of both compounds. 相似文献
7.
A. Furlani S. Licoccia M. V. Russo A. Camus N. Marsich 《Journal of polymer science. Part A, Polymer chemistry》1986,24(5):991-1005
In polymerization reactions of phenylacetylene three different types of polyphenylacetylene (PPA) were prepared by using Rh and Pt complexes as catalysts in different reaction conditions. Type I PPA is obtained with [Rh (COD) Chel] PF6 complexes (COD = cis,cis-cycloocta 1,5-diene; chel = 2,2′-bipyridine, 1,10-phenanthroline, 2,9-dimethyl-1,10-phenanthroline, 5,6-dimethyl-1,10-phenanthroline, 3,4,7,8-tetramethyl-1,10-phenanthroline) in bulk, benzene methanol, while type II PPA is obtained with the same catalysts in p-dioxane and type III PPA in the presence of [Pt (? C?CPh)2(PPh3)2] in bulk. Type I, II, and III PPA exhibit different IR and 1H-NMR spectra, which have been compared with literature data. Correlations proposed by different Authors between spectral properties of PPA and chain structures are also discussed. 相似文献
8.
Edjane R. Dos Santos Juliana U. Ribeiro Angelica E. Graminha Javier Ellena Heloísa S. Selistre-de-Araujo 《Journal of Coordination Chemistry》2016,69(23):3518-3530
We herein report the synthesis and characterization of Ru(II)/amino acid complexes with general formula [Ru(AA-H)(dppb)(4-mebipy)](PF6), where AA-H means the deprotonated amino acids Gly, Ala, Val, Met, Trp, Tyr, and Ser; dppb is 1,4-bis(diphenylphosphino)butane and 4-mebipy = 4,4′-dimethyl-2,2′-bipyridine. The complexes were characterized by 31P{1H}, 13C, and 1H NMR spectroscopy, as well as X-ray crystallographic analysis of [Ru(DL-Ala-H)(dppb)(4-mebipy)]+, suggesting the presence of diastereoisomers. The complexes exhibit IC50 values against breast tumor cells (MDA-MB-231) comparable with cisplatin. In addition, the Ru(II)-based complex with tryptophan inhibited tumor cell adhesion to collagen type I. Therefore, the use of ruthenium complexes containing amino acids can be an interesting tool for development of new therapeutic agents. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(10):1688-1704
One new pyrazole-based ligand, 1-carboxymethyl-3,5-dimethyl-1H-pyrazole-4-carboxylic acid (H2cmdpca), has been synthesized and characterized. Structural analysis reveals that H2cmdpca crystallizes in the monoclinic system and adopts a 3-D supramolecular network via the interaction of intermolecular hydrogen bonds. The reactions of Cd(II) ions with H2cmdpca and 4,4′-bipyridine (4,4′-bpy) afforded three metal complexes, [Cd(4,4′-bpy)(Hcmdpca)2(H2O)3]·H2O (1), [Cd(4,4′-bpy)(Hcmdpca)2(H2O)]·3H2O (2), and [Cd(4,4′-bpy)(Hcmdpca)2(H2O)] (3). Structural analyses reveal that these complexes are all monoclinic and 1, 2, and 3 exhibit mononuclear, 1-D chain, and 1-D with binuclear loop structures, respectively, which are further assembled into 3-D supramolecular frameworks through non-covalent interactions. 1 and 2 are true supramolecular isomers, while 2 and 3 are “pseudo-supramolecular” isomers. In addition, the thermal stability and luminescent properties of the complexes are also investigated. 相似文献
10.
《Journal of Coordination Chemistry》2012,65(11):1872-1881
Two lead(II)-thiocyanato coordination polymers with 5,5′-dimethyl-2,2′-bipyridine (5,5′-dm-2,2′-bpy) and 4,4′-dimethoxy-2,2′-bipyridine (4,4′-dmo-2,2′-bpy) as chelating ligands were synthesized and characterized by elemental analysis, IR and 1H-NMR spectroscopy, thermal behavior, and X-ray crystallography. These complexes have formulas [Pb(5,5′-dm-2,2′-bpy)(NCS)2] n (1) and [Pb(4,4′-dmo-2,2′-bpy)(NCS)2] n (2). The coordination numbers of PbII in 1 and 2 are four, PbN4, with “stereo-chemically active” electron pairs and hemidirected coordination spheres. Considering Pb···S as weak bonds, 1 and 2 are 1- and 2-D coordination polymers, respectively. The supramolecular features in these complexes are guided/controlled by weak directional intermolecular interactions. 相似文献
11.
《Journal of organometallic chemistry》1986,301(2):203-208
A cyclometallated analogue of the well-known tris(2,2′-bipyridine)ruthenium(II) cation has been prepared from 2-phenylpyridine. The bis(2,2′-bipyridine)(2-phenylpyridine-C,N)ruthenium(II) cation is readily prepared from [Ru(bipy)2Cl2] and 2-phenylpyridine in the presence of silver(I); the spectroscopic and electrochemical properties of this species are compared with those of [Ru(bipy)3]2+. 相似文献
12.
《Journal of Saudi Chemical Society》2022,26(4):101507
Nine Hg(II) complexes, [Hg(DiphtS)2(L-L)](2–7) {where, HDiphtS = 4,5-diphenyl-1,2,4-triazole-3-thiol; L-L = bis(diphenylphosphino)ethane (dppe) (2); 1,3-bis(diphenylphosphino)propane (dppp)(3); 1,4-bis(diphenylphosphino)butane (dppb)(4); 1,1′-bis(diphenylphosphino)ferrocene (dppf)(5); 2,2′-bipyridine (Bipy)(6) and 1,10-phenanthroline (Phen)(7) } or [Hg(DiphtS)2(L)2] (8–9) {where L = triphenylphosphine (Ph3P) (8) and triphenylphosphine sulphide (Ph3PS) (9)}, have been prepared form the reaction of [Hg(DiphtS)2](1) with phosphine or amine as co-ligands. Then characterized by the IR, NMR (1H and 31P) spectroscopy, elemental analysis, molar conductivity. The results supported the monodentate behaviour of HDiphtS ligand in all complexes (1–9) in anion form through the sulfur atom. Complexes 1, 2 and 6 have been used as single source precursors for the preparation of ethylene-diamine capped HgS-nanoparticles. Powder X-ray diffraction (PXRD), and scanning electron microscopy (SEM), have been used to characterize the HgS nanoparticles. 相似文献
13.
The supramolecular palladium dithiolate complexes, [Pd2(dppe)2{S(C6H4)nS}]2(OTf)4 and [Pd2(dppe)2(SCH2C6H4CH2S)]4(OTf)8 (dppe = 1,2-bis(diphenylphosphino)ethane) has been investigated as highly stable and robust catalysts in Heck C-C coupling reactions. The arylation of butyl acrylate and styrene with various aryl bromides under optimized catalytic systems, showed excellent yield and turnover number (410,000) of the products. The tetranuclear complexes showed slightly higher catalytic activity than the octanuclear complex. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(19):3419-3431
A series of Cu(II) carboxylate complexes (carboxylate?=?2-fluorobenzoic acid (2-HFBA) or 4-fluorobenzoic acid (4-HFBA)) containing either one chelating 1,10-phenanthroline (phen) or 2,2′-bipyridine (bipy) have been synthesized and characterized by single-crystal X-ray diffraction, IR spectroscopy, and thermal analyses. In [Cu(bipy)(H2O)(2-FBA)2] (1), [Cu(bipy)(H2O)(4-FBA)2] (3), and [Cu(phen)(H2O)(2-FBA)2] (4), Cu is five-coordinate in a square pyramidal geometry and four-coordinate in [Cu(phen)(2-FBA)2] (2). The four complexes are extended into 1-D chains through hydrogen-bonding and π?···?π interactions in 1 and 4, only hydrogen-bonding in 2, and π?···?π interactions in 3. These contacts lead to aggregation and supramolecular self-assembly. 相似文献
15.
Antonio Téllez-López Víctor Sánchez-Mendieta Jonathan Jaramillo-García Luis D. Rosales-Vázquez Iván García-Orozco Raúl A. Morales-Luckie Roberto Escudero Francisco Morales-Leal 《Transition Metal Chemistry》2016,41(8):879-887
Manganese coordination polymers {Mn(fum)(5dmb)(H2O)2} n (1) and {[Mn2(fum)2(4dmb)2]·H2O} n (2) (fum = fumarato; 5dmb = 5,5′-dimethyl-2,2′-bipyridine; 4dmb = 4,4′-dimethyl-2,2′-bipyridine) were obtained from one-pot, solution reactions under ambient conditions. The fum ligand acquires different coordination modes in the presence of the different dmb ancillary ligands, promoting distinctive crystal structures, including divergent dimensionalities. Thus, X-ray single-crystal data reveal that complex 1 crystallizes in a monoclinic system with C2/c space group and forms an infinite one-dimensional polymer. The Mn(II) center is six-coordinated and displays a distorted octahedral configuration. In addition, the solid-state self-assembly of the polymeric structure of 1 gives rise to a two-dimensional (2D) supramolecular framework, mainly through hydrogen bonding. In contrast, complex 2 crystallizes in a monoclinic system with a Cc space group and forms an infinite 2D coordination polymer having dinuclear units. The Mn(II) center has a distorted octahedral configuration. The thermal stabilities of both coordination polymers were investigated. Variable-temperature magnetic measurements show that complex 1 is paramagnetic, while complex 2 exhibits weak antiferromagnetic coupling between adjacent Mn(II) centers. 相似文献
16.
Bing-Fan Long Qin Huang Shu-Long Wang Yan Mi Meng-Fan Wang Ting Xiong 《Journal of Coordination Chemistry》2019,72(4):645-663
Five cobalt(II) complexes based on 1H-indazole-3-carboxylic acid (H2L), [Co(phen)(HL)2]·2H2O (1), [Co(5,5′-dimethyl-2,2′-bipy)(HL)2] (2), [Co(2,2′-bipy)2(HL)2]·5H2O (3), [Co2(2,9-dimethyl-1,10-phen)2(L)2] (4) and [Co2(6,6′-dimethyl-2,2′-bipy)2(L)2]·H2O (5) (2,2'-bipy = 2,2′-bipyridine, phen = 1,10-phenanthroline), have been synthesized and structurally characterized by elemental analyses, IR and UV-vis spectroscopies and single-crystal X-ray crystallography. The results indicate that 1–3 possess mononuclear Co(II) structures, while 4 and 5 exhibit binuclear structure. 1D water tape which is linked by the multiple hydrogen bonds was embedded in the 3D motif of complex 3. Complexes 4 and 5 show two orthogonal planes of motif that was constituted by phen/2,2′-bipy and indazole acid, respectively. The intermolecular interactions including hydrogen bonding and π-π stacking interactions are stabilizing these complexes. The interactions of the synthesized complexes with calf-thymus DNA (CT-DNA) have been investigated by UV-vis absorption titration, ethidium bromide displacement assay and viscosity measurements. The results reveal that the complexes could interact with CT-DNA via a groove binding mode. Their behavior rationalization was further theoretically studied by molecular docking. 相似文献
17.
Mauro Maestri Diana Sandrini Vincenzo Balzani Alex von Zelewsky Christine Deuschel-Cornioley Philippe Jolliet 《Helvetica chimica acta》1988,71(5):1053-1059
The absorption spectra, luminescence spectra, and luminescence lifetimes of the isomeric [M(bph)(bpy)] and [M(phpy)2] complexes M = Pt(II) or Pd(II), bph2? = 1,1′-biphenyl-2,2′-diyl dianion, phpy? = 2-phenylpyridine-2′-yl anion, and bpy = 2,2′-bipyridine have been investigated and compared with those of [M(bpy)2]2+ complexes and of the free protonated ligands H2bph, Hbpy+, and Hphpy. In the absorption spectra, the region below 320 mm is dominated by ligand-centered (LC) transitions, whereas metal-to-ligand charge transfer (MLCT) transitions are responsible for the bands present in the near UV/VIS region. The MLCT bands move to higher energies on replacing Pt with Pd and in going from [M(bph)(bpy)] to the [M(phpy)2] isomer. For the mixed-ligand complexes, evidence for both M → bph2? (at higher energies) and M → bpy bands is found. The structured luminescence observed at 77 K shows lifetimes of 4.0 and 1.1 μs for [Pt(phpy)2] and [Pt(bph)(bpy)], respectively, and 480 and 250 μs for the analogous Pd complexes. On the basis of the energy and lifetime data, the luminescence of the Pt(II) complexes is assigned to the lowest triplet MLCT excited state, whereas for the Pd complexes the luminescent state is thought to result from a mixture of MLCT and LC triplet levels. 相似文献
18.
Twelve new copper(II) complexes in which N,N′-bis-(2-pyridylmethyl)-oxamidatocopper(II) or N,N′-bis(2-pyridylethyl)-oxamidatocopper(II) coordinates as a bidentate ligand have been isolated and characterized. These complexes have a structure bridged by the oxamide group (including two tetranuclear complexes formed by olation of two binuclear complexes, of. Fig. 1), and possess Cu? Cu interaction resulting in a sub-normal magnetic moment at room temperature. In one of them, [Cu2(PMoxd) (bipy)2] (NO3)2 (cf. Fig. 2), each copper(II) ion has a five-coordinated environment. 相似文献
19.
The reaction of benzoyl chloride with [Rh(dppp)2]Cl at 190°C and with [Rh(dppp)Cl]1 or 2 at 25°C where dppp 1,3-bis(diphenylphosphino)propane has been examined. In both cases the five coordinate compound RhCl2(COPh)-(dppp) was rapidly formed and isolated in high yield. This compound does not undergo phenyl migration to RhCl2(CO)(Ph)(dppp) even upon warming to 190°C in benzoyl chloride solution and no decarbonylation products are observed. This is in marked contrast to the reaction of RhCl(PPh3)3 with benzoyl chloride where the migrated product RhCl2(CO)(Ph)(PPh3)2 is formed with the eventual reductive elimination of chlorobenzene. The single crystal X-ray analysis of RhCl2(COPh)(dppp) has been carried out (R 0.036). The compound is square pyramidal with the COPh group in the apical position. The Rh—C bond distance of 1.992(3) Å is short for a RhIII—Cσ bond and indicates dπ → π★ back bonding. 相似文献
20.
Jonathan Jaramillo-García Antonio Téllez-López Rogelio Martínez-Domínguez Raul A. Morales-Luckie Diego Martínez-Otero 《Journal of Coordination Chemistry》2016,69(9):1525-1540
Three new Cu(II) complexes composed of malonato (mal), methylmalonato (memal), 4,4′-di-tert-butyl-2,2′-bipyridine (tbpy) and 5,5′-dimethyl-2,2′-bipyridine (mebpy) ligands, Cu(H2O)(mal)(tbpy) (1), Cu(H2O)(memal)(tbpy) (2) and Cu4(H2O)4(memal)4(mebpy)4·11H2O (3) were synthesized by simple one-pot solution reactions at ambient conditions. Single-crystal X-ray diffraction analyses reveal that the Cu(II) ions exhibit a distorted five-coordinate square pyramidal geometry. These three complexes display supramolecular arrays due to hydrogen-bonding interactions. Complexes 1 and 2 show 1-D supramolecular structures; 1 forms a double-ion chain, unlike 2, which only generates a single-ion chain. In 3, there are two identical monomers in the asymmetric unit with Z″ = 2; its high number of noncoordinated water molecules, along with hydrogen-bonding interactions between aqua ligand and memal ligand, generate a supramolecular tetramer, which mimics to produce a 3-D supramolecular framework. Besides this fascinating and yet uncommon crystallographic phenomenon in 3, the structural differences found in these complexes arise from the substituted groups in the malonato dianion and in the bipyridine ligands. These compounds exhibit weak ferromagnetic-exchange interactions. 相似文献