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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

2016-10Journal article Restricted access
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dc.contributor.authorMartins, Nuno M. R.
dc.contributor.authorMahmudov, Kamran
dc.contributor.authorGuedes Da Silva, M. Fátima C.
dc.contributor.authorMartins, Luisa
dc.contributor.authorPombeiro, Armando
dc.date.accessioned2017-05-29T13:57:13Z
dc.date.available2017-05-29T13:57:13Z
dc.date.issued2016-10
dc.description.abstractThe aquasoluble [Cu(1κN,O2:2κO-HL1)(S)]2 [S = CH3OH (1), (CH3)2NCHO (2)] and [Cu(κN-HL1)(en)2]·CH3OH·H2O (3) CuII complexes were prepared by the reaction of CuII 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 FeIII complex [Fe(κN3-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 CuII 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 × 102) after 60 min of MW irradiation at 120 °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.sponsorshipUID/QUI/00100/2013
dc.description.sponsorship14-43-00017
dc.description.sponsorshipSFRH/BD/52371/2013
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. ISSN 1144-0546. Vol. 40, (2016), pp. 10071-10083pt_PT
dc.identifier.doi10.1039/C6NJ02161Apt_PT
dc.identifier.issn1144-0546
dc.identifier.urihttp://hdl.handle.net/10400.21/7105
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.relation.publisherversionhttp://pubs.rsc.org/en/content/articlepdf/2016/nj/c6nj02161apt_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.citation.endPage10083pt_PT
oaire.citation.startPage10071pt_PT
oaire.citation.volume40pt_PT
person.familyNameMahmudov
person.familyNameGuedes da Silva
person.familyNameMartins
person.familyNamePombeiro
person.givenNameKamran
person.givenNameM. Fátima C.
person.givenNameLuisa
person.givenNameArmando
person.identifier789079
person.identifier637885
person.identifier.ciencia-idCD1F-CB64-9EA5
person.identifier.ciencia-id7619-8E8E-979A
person.identifier.ciencia-idE218-E297-A4EA
person.identifier.ciencia-id8311-38FA-CEFB
person.identifier.orcid0000-0003-0743-6520
person.identifier.orcid0000-0003-4836-2409
person.identifier.orcid0000-0002-5403-9352
person.identifier.orcid0000-0001-8323-888X
person.identifier.ridI-1409-2013
person.identifier.ridH-8274-2012
person.identifier.ridG-6210-2011
person.identifier.ridI-5945-2012
person.identifier.scopus-author-id24468352000
person.identifier.scopus-author-id6701761571
person.identifier.scopus-author-id8650947800
person.identifier.scopus-author-id7006067269
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication71d8ce81-a614-49c5-8606-e351da465649
relation.isAuthorOfPublication18e14ad3-9937-46d0-83b2-36fab224c1c0
relation.isAuthorOfPublication8ed70b09-b4d3-4a5d-9f75-12b13a332204
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relation.isAuthorOfPublication.latestForDiscovery8ed70b09-b4d3-4a5d-9f75-12b13a332204

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