Author: José A. García-vázquez

Modulating the DNA cleavage ability of copper(II) Schiff bases through ternary complex formation

2018

Copper(II) complexes with the potentially tridentate Schiff bases N-[(3-ethoxy-2-hydroxyphenyl)methylidene]-N′-tosylbenzene-1,2-diamine (H2L1) and N-[(2-hydroxynaphthanyl)methylidene]-N′-tosylbenzene-1,2-diamine (H2L2) have been synthesized by electrochemical oxidation of the metal in an electrochemical cell containing a solution of the corresponding ligand in acetonitrile. Adducts of these compounds with 2,2′-bipyridine (2,2′-bpy), 4,4′-bipyridine (4,4′-bpy) or 1,10-phenanthroline (phen) were also obtained. The complexes have been characterized by microanalysis, mass spectrometry, EPR, IR and UV-Vis spectroscopies, as well as DFT calculations. The ligand H2L1 and the compounds [CuL1(H2O)]·…

010405 organic chemistrySupramolecular chemistrychemistry.chemical_elementNANOPARTÍCULASGeneral Chemistry010402 general chemistry01 natural sciencesCopperCatalysisSquare pyramidal molecular geometry0104 chemical scienceslaw.inventionAdductMetalCrystallographychemistry.chemical_compoundchemistrylawvisual_artMaterials Chemistryvisual_art.visual_art_mediumElectron paramagnetic resonanceAcetonitrileTernary complex

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Electrochemical synthesis and structural characterization of Co(II), Ni(II) and Cu(II) complexes of N,N-bis(4,5-dimethyl-2-hydroxybenzyl)-N-(2-pyridy…

2009

The electrochemical oxidation of anodic metal (cobalt, nickel or copper) in a cell containing an acetonitrile solution of the ligand N,N-bis(4,5-dimethyl-2-hydroxybenzyl)-N-(2-pyridylmethyl)amine (H2L) affords complexes [Co2L2].H2O (1), [Ni3L3] (2) and [Cu2L2] 3H2O (4). On using nickel as the anode and the addition to the solution electrolytic phase of the amount of water necessary to saturate the solution, the electrolytic process gave rise to the new compound [Ni2L2(H2O)1.5].CH3CN (3). Compounds 1 and 4 are dimeric and the metal atoms are pentacoordinated. Compound 3 also consists of dimeric neutral molecules with the nickel atoms in both penta- and hexacoordinated environments. The cryst…

Models MolecularPyridinesInorganic chemistrychemistry.chemical_elementCrystal structureCrystallography X-RayLigandsInorganic ChemistryMetalchemistry.chemical_compoundNickelElectrochemistryOrganometallic CompoundsMoleculeAminesAcetonitrileMolecular StructureLigandCobaltNickelCrystallographychemistryIntramolecular forcevisual_artvisual_art.visual_art_mediumCobaltOxidation-ReductionCopperDalton transactions (Cambridge, England : 2003)

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Metal complexes of a novel heterocyclic benzimidazole ligand formed by rearrangement-cyclization of the corresponding Schiff base. Electrosynthesis, …

2018

The electrochemical oxidation of anodic metals (M = cobalt, nickel, copper, zinc and cadmium) in a solution of the ligand 1H-anthra[1,2-d]imidazol-6,11-dione-2-[2-hydroxyphenyl] [H2L] afforded homoleptic [ML] compounds. The addition to the electrochemical cell of coligands (L′) such as 2,2′-bipyridine (bpy) or 1,10-phenanthroline (phen) allowed the synthesis, in one step, of heteroleptic [MLL′] compounds. The crystal structures of H2L (1), [CoL(MeOH)]2 (2), [CoL(phen)]2 (3), [NiL(bpy)]2 (4), [CuL(bpy)] (5), [CuL(phen)] (6) and [CdL(bpy)]2 (7) have been determined by X-ray diffraction techniques. The crystal structures of 2, 3, 4 and 7 consist of dimeric species in which both metallic atoms …

Infrared spectroscopyCrystal structureChemistry Techniques SyntheticMicrobial Sensitivity Tests010402 general chemistryElectrosynthesisLigands01 natural sciencesInorganic ChemistryMetalchemistry.chemical_compoundCoordination ComplexesMetals HeavyElectrochemistryHomolepticSchiff BasesSchiff base010405 organic chemistryLigandHydrogen bondMagnetic Phenomena0104 chemical sciencesAnti-Bacterial AgentsCrystallographychemistryCyclizationvisual_artvisual_art.visual_art_mediumBenzimidazolesDalton transactions (Cambridge, England : 2003)

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