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Copper(II) and iron(III) complexes with arylhydrazone of ethyl 2-cyanoacetate or formazan ligands as catalysts for oxidation of alcohols

2016-12Journal article Restricted access
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dc.contributor.authorMartins, Nuno
dc.contributor.authorMahmudov, Kamran T.
dc.contributor.authorGuedes Da Silva, M. Fátima C.
dc.contributor.authorMartins, Luisa
dc.contributor.authorPombeiro, Armando
dc.date.accessioned2021-05-19T11:24:37Z
dc.date.available2021-05-19T11:24:37Z
dc.date.issued2016-12
dc.description.abstractThe aquasoluble [Cu(1 kappa N,O-2:2 kappa O-HL1)(S)](2) [S = CH3OH (1), (CH3)(2)NCHO (2)] and [Cu(kappa N-HL1)(en)(2)]center dot CH3OH center dot H2O (3) Cu-II complexes were prepared by the reaction of Cu-II nitrate hydrate with the new ligand (E/Z)-4-(2-(1-cyano-2-ethoxy-2-oxoethylidene)hydrazinyl)-3-hydroxybenzoic acid (H3L1), in the presence (for 3) or absence (for 1 and 2) of ethylenediamine (en), while the Fe-III complex [Fe(kappa N-3-HL2)(2)] (4) was isolated by treatment of iron(III) chloride hexahydrate with the new ligand (1E,1E)-N',2-di(1H-1,2,4-triazol-3-yl)diazenecarbohydrazonoyl cyanide (H3L2), and characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction. Cooperative E,Z -> E isomerization of H3L1, induced by coordination and ionic interactions, occurs upon interaction with Cu-II in the presence of en. Complexes 1-4 act as catalyst precursors for the solvent-free microwave (MW) assisted selective oxidation of primary or secondary alcohols and diols to the corresponding aldehydes, ketones and diketones, respectively, with yields in the 5-99% range (TONs up to 4.96 x 10(2)) after 60 min of MW irradiation at 120 degrees C. The influence of temperature, time and organic radicals was studied and also the regioselective oxidation of the catalytic systems involving the primary and secondary alcohols.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMARTINS, Nuno M. R.; [et al] – Copper(II) and iron(III) complexes with arylhydrazone of ethyl 2-cyanoacetate or formazan ligands as catalysts for oxidation of alcohols. New Journal of Chemistry. ISSN 1144-0546. Vol. 40, N.º 12 (2016), pp.10071-10083pt_PT
dc.identifier.doi10.1039/c6nj02161apt_PT
dc.identifier.eissn1369-9261
dc.identifier.issn1144-0546
dc.identifier.urihttp://hdl.handle.net/10400.21/13363
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.relationSFRH/BD/52371/2013 - FCT European Commissionpt_PT
dc.relation14-43-00017 - Russian Science Foundation (RSF)pt_PT
dc.relation.publisherversionhttps://pubs.rsc.org/en/content/articlepdf/2016/nj/c6nj02161apt_PT
dc.subjectCopper(II)pt_PT
dc.subjectIron(III)pt_PT
dc.subjectArylhydrazone of ethyl 2-cyanoacetatept_PT
dc.subjectOxidation of alcoholspt_PT
dc.titleCopper(II) and iron(III) complexes with arylhydrazone of ethyl 2-cyanoacetate or formazan ligands as catalysts for oxidation of alcoholspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F00100%2F2013/PT
oaire.citation.endPage10083pt_PT
oaire.citation.issue12pt_PT
oaire.citation.startPage10071pt_PT
oaire.citation.titleNew Journal of Chemistrypt_PT
oaire.citation.volume40pt_PT
oaire.fundingStream5876
person.familyNameMartins
person.familyNameMahmudov
person.familyNameGuedes da Silva
person.familyNameMartins
person.familyNamePombeiro
person.givenNameNuno
person.givenNameKamran
person.givenNameM. Fátima C.
person.givenNameLuisa
person.givenNameArmando
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person.identifier.ridG-3485-2017
person.identifier.ridI-1409-2013
person.identifier.ridH-8274-2012
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person.identifier.scopus-author-id57189394320
person.identifier.scopus-author-id24468352000
person.identifier.scopus-author-id6701761571
person.identifier.scopus-author-id8650947800
person.identifier.scopus-author-id7006067269
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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