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New copper(II) tetramer with arylhydrazone of barbituric acid and its catalytic activity in the oxidation of cyclic C5–C8 alkanes

2016-10-15Journal article Restricted access
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dc.contributor.authorSutradhar, Manas
dc.contributor.authorAlegria, Elisabete
dc.contributor.authorRoy Barman, Tannistha
dc.contributor.authorGuedes Da Silva, M. Fátima C.
dc.contributor.authorMahmudov, Kamran T.
dc.contributor.authorGuseynov, Firuddin I.
dc.contributor.authorPombeiro, Armando
dc.date.accessioned2020-07-15T14:02:52Z
dc.date.available2020-07-15T14:02:52Z
dc.date.issued2016-10-15
dc.description.abstract2-(2-(2,4,6-Trioxotetrahydropyrimidin-5(2H)-ylidene)hydrazinyl)terephthalic acid (H5L) was synthesized by azocoupling of diazonium salts of 2-aminoterephthalic acid with barbituric acid and characterized by IR, 1H and 13C NMR spectroscopies and ESI-MS analysis. In solution and solid state, H5L exists in the hydrazone form. The reaction of H5L with copper(II) nitrate hydrate in methanol affords the tetramer species [Cu2(μ2-1κNOO′:2κO′O″-H3L)2]2 (1) where carboxylate groups bridge two Cu(II) centers in a bridging chelate μ2-(O,O′,O′) fashion, giving rise to a cyclic Cu4O4 core. A rare and intense intermolecular non-covalent interaction of the type Ocarboxylic(lone pair)⋯π(pyrimidine), with O⋯centroid distance of 2.705 Å, was found in 1. In addition, medium intense N H⋯O and O H⋯O contacts expand the structure to a 3D network. Compound 1 behaves as efficient catalyst in the mild oxidation, by aqueous H2O2 in acidic MeCN/H2O media, of different cyclic C5–C8 alkanes to produce the corresponding alcohols and ketones. Overall product yields up to ca. 25% (based on alkane) were achieved.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSUTRADHAR, Manas; [et al] – New copper(II) tetramer with arylhydrazone of barbituric acid and its catalytic activity in the oxidation of cyclic C5–C8 alkanes. Polyhedron. ISSN 0277-5387. Vol. 117 (2016), pp. 666-671pt_PT
dc.identifier.doi10.1016/j.poly.2016.07.002pt_PT
dc.identifier.issn0277-5387
dc.identifier.urihttp://hdl.handle.net/10400.21/12040
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPTDC/QEQ-QIN/3967/2014 - FCTpt_PT
dc.relationMETAL CLUSTERS: STRUCTURAL ANALYSIS, APPLICATIONS IN CATALYSIS AND MOLECULAR MAGNETISM
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dc.subjectArylhydrazone of barbituric acidpt_PT
dc.subjectTetrameric copper(II) complexpt_PT
dc.subjectPeroxidative oxidation of alkanespt_PT
dc.subjectX-ray structurept_PT
dc.subjectNon-covalent interactionpt_PT
dc.titleNew copper(II) tetramer with arylhydrazone of barbituric acid and its catalytic activity in the oxidation of cyclic C5–C8 alkanespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMETAL CLUSTERS: STRUCTURAL ANALYSIS, APPLICATIONS IN CATALYSIS AND MOLECULAR MAGNETISM
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F00100%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F86067%2F2012/PT
oaire.citation.endPage671pt_PT
oaire.citation.startPage666pt_PT
oaire.citation.titlePolyhedronpt_PT
oaire.citation.volume117pt_PT
oaire.fundingStream5876
person.familyNameSutradhar
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person.familyNameGuedes da Silva
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person.givenNameManas
person.givenNameElisabete
person.givenNameTannistha
person.givenNameM. Fátima C.
person.givenNameKamran
person.givenNameArmando
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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