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Dinuclear Mn (II,II) complexes: magnetic properties and microwave assisted oxidation of alcohols

2014Journal article Restricted access
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dc.contributor.authorSutradhar, Manas
dc.contributor.authorMartins, Luisa
dc.contributor.authorGuedes Da Silva, M. Fátima C.
dc.contributor.authorAlegria, Elisabete
dc.contributor.authorLiu, Cai-Ming
dc.contributor.authorPombeiro, Armando
dc.date.accessioned2015-08-24T11:03:31Z
dc.date.available2015-08-24T11:03:31Z
dc.date.issued2014
dc.description.abstractA series of six new mixed-ligand dinuclear Mn(II, II) complexes of three different hydrazone Schiff bases (H3L1, H3L2 and H3L3), derived from condensation of the aromatic acid hydrazides benzohydrazide, 2-aminobenzohydrazide or 2-hydroxybenzohydrazide, with 2,3-dihydroxy benzaldehyde, respectively, is reported. Reactions of Mn(NO3)(2) center dot 4H(2)O with the H3L1-3 compounds, in the presence of pyridine (1 : 1 : 1 mole ratio), in methanol at room temperature, yield [Mn(H2L1)(py)(H2O)](2)(NO3)(2) center dot 2H(2)O (1 center dot 2H(2)O), [Mn(H2L2)(py)(CH3OH)](2)(NO3)(2) center dot 4H(2)O (2 center dot 4H(2)O) and [Mn(H2L3)(py)(H2O)](2)(NO3)(2) (3) respectively, whereas the use of excess pyridine yields complexes with two axially coordinated pyridine molecules at each Mn(II) centre, viz. [Mn(H2L1)(py)(2)] 2(NO3)(2) center dot H2O (4 center dot H2O), [Mn(H2L2)(py) H-O (6 center dot 2CH(3)OH), respectively. In all the complexes, the (H2L1-3)-ligand coordinates in the keto form. Complexes 1 center dot 2H(2)O, 2 center dot 4H(2)O, 4 center dot H2O, 5 center dot 2H(2)O and 6 center dot 2CH(3)OH are characterized by single crystal X-ray diffraction analysis. The complexes 1, 2 and 6, having different coordination environments, have been selected for variable temperature magnetic susceptibility measurements to examine the nature of magnetic interaction between magnetically coupled Mn(II) centres and also for exploration of the catalytic activity towards microwave assisted oxidation of alcohols. A yield of 81% (acetophenone) is obtained using a maximum of 0.4% molar ratio of catalyst relative to the substrate in the presence of TEMPO and in aqueous basic solution, under mild conditions.por
dc.identifier.citationSUTRADHAR, Manas; [et al] – Dinuclear Mn (II,II) complexes: Magnetic properties and microwave assisted oxidation of alcohols. Dalton Transactions. ISSN: 1477-9226. Vol. 43, nr. 10 (2014), pp. 3966-3977por
dc.identifier.doi10.1039/c3dt52774c
dc.identifier.issn1477-9226
dc.identifier.issn1477-9234
dc.identifier.urihttp://hdl.handle.net/10400.21/4935
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherRoyal Society of Chemistrypor
dc.subjectSingle-Molecule Magnetpor
dc.subjectMononuclear Oxidovanadium(V) Complexpor
dc.subjectBinuclear Manganese Metalloenzymepor
dc.subjectElectron-Paramagnetic-Resonancepor
dc.subjectEfficient Functional-Modelpor
dc.subjectOxygen-Evolving Complexpor
dc.subjectSchiff-Base Complexpor
dc.subjectAerobic Oxidationpor
dc.subjectCatalytic-Activitypor
dc.subjectCopper(II) Complexespor
dc.titleDinuclear Mn (II,II) complexes: magnetic properties and microwave assisted oxidation of alcoholspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceCambspor
oaire.citation.endPage3977por
oaire.citation.issue10por
oaire.citation.startPage3966por
oaire.citation.titleDalton Transactionspor
oaire.citation.volume43por
person.familyNameSutradhar
person.familyNameMartins
person.familyNameGuedes da Silva
person.familyNameAlegria
person.familyNameLiu
person.familyNamePombeiro
person.givenNameManas
person.givenNameLuisa
person.givenNameM. Fátima C.
person.givenNameElisabete
person.givenNameCai-Ming
person.givenNameArmando
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person.identifier.orcid0000-0003-4060-1057
person.identifier.orcid0000-0001-7184-6693
person.identifier.orcid0000-0001-8323-888X
person.identifier.ridM-4089-2013
person.identifier.ridG-6210-2011
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person.identifier.scopus-author-id14053084900
person.identifier.scopus-author-id8650947800
person.identifier.scopus-author-id6701761571
person.identifier.scopus-author-id8315848300
person.identifier.scopus-author-id7006067269
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
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