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µ-Chlorido-bridged dimanganese(II) complexes of the schiff base derived from [2+2] condensation of 2,6-diformyl-4-methylphenol and 1,3-bis(3-aminopropyl)tetramethyldisiloxane: structure, magnetismo, electrochemical behaviour, and catalytic oxidation of secondary alcohols

2014-01Journal article Restricted access
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dc.contributor.authorAlexandru, Mihaela
dc.contributor.authorCazacu, Maria
dc.contributor.authorArvinte, Adina
dc.contributor.authorShova, Sergiu
dc.contributor.authorTurta, Constantin
dc.contributor.authorSimionescu, Bogdan C.
dc.contributor.authorDobrov, Anatolie
dc.contributor.authorAlegria, Elisabete
dc.contributor.authorMartins, Luisa
dc.contributor.authorPombeiro, Armando
dc.contributor.authorArion, Vladimir B.
dc.date.accessioned2015-08-24T14:54:27Z
dc.date.available2015-08-24T14:54:27Z
dc.date.issued2014-01
dc.description.abstractThe reaction of 2,6-diformyl-4-methylphenol with 1,3-bis(3-aminopropyl)tetramethyldisiloxane in the presence of MnCl2 in a 1:1:2 molar ratio in methanol afforded a dinuclear -chlorido-bridged manganese(II) complex of the macrocyclic [2+2] condensation product (H2L), namely, [Mn2Cl2(H2L)(HL)]Cl center dot 3H(2)O (1). The latter afforded a new compound, namely, [Mn2Cl2(H2L)(2)][MnCl4]center dot 4CH(3)CN center dot 0.5CHCl(3 center dot)0.4H(2)O (2), after recrystallisation from 1:1 CHCl3/CH3CN. The co-existence of the free and complexed azomethine groups, phenolato donors, mu-chlorido bridges, and the disiloxane unit were well evidenced by ESI mass spectrometry and FTIR spectroscopy and confirmed by X-ray crystallography. The magnetic measurements revealed an antiferromagnetic interaction between the two high-spin (S = 5/2, g = 2) manganese(II) ions through the mu-chlorido bridging ligands. The electrochemical behaviour of 1 and 2 has been studied, and details of their redox properties are reported. Both compounds act as catalysts or catalyst precursors in the solvent-free low-power microwave-assisted oxidation of selected secondary alcohols, for example, 1-phenylethanol, cyclohexanol, 2- and 3-octanol, to the corresponding ketones in the absence of solvent. The highest yield of 72% was achieved for 1-phenylethanol by using a maximum of 1% molar ratio of catalyst relative to substrate.por
dc.identifier.citationµ-Chlorido-Bridged Dimanganese(II) Complexes of the schiff base derived from [2+2] condensation of 2,6-Diformyl-4-Methylphenol and 1,3-Bis(3-Aminopropyl)Tetramethyldisiloxane: Structure, magnetismo, electrochemical behaviour, and catalytic oxidation of secondary alcohols. European Journal of Inorganic Chemistry. ISSN: 1434-1948. Vol. 2014, nr. 1 (2014), pp. 120-131por
dc.identifier.doi10.1002/ejic.201300969
dc.identifier.issn1434-1948
dc.identifier.issn1099-0682
dc.identifier.urihttp://hdl.handle.net/10400.21/4970
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWiley-V C H Verlag GMBHpor
dc.subjectManganesepor
dc.subjectTemplate synthesispor
dc.subjectMacrocyclespor
dc.subjectSchiff basespor
dc.subjectOxidationpor
dc.titleµ-Chlorido-bridged dimanganese(II) complexes of the schiff base derived from [2+2] condensation of 2,6-diformyl-4-methylphenol and 1,3-bis(3-aminopropyl)tetramethyldisiloxane: structure, magnetismo, electrochemical behaviour, and catalytic oxidation of secondary alcoholspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage131por
oaire.citation.issue1por
oaire.citation.startPage120por
oaire.citation.titleEuropean Journal of Inorganic Chemistrypor
oaire.citation.volume2014por
person.familyNameCazacu
person.familyNameArvinte
person.familyNameShova
person.familyNameTurta
person.familyNameAlegria
person.familyNameMartins
person.familyNamePombeiro
person.givenNameMaria
person.givenNameAdina
person.givenNameSergiu
person.givenNameConstantin
person.givenNameElisabete
person.givenNameLuisa
person.givenNameArmando
person.identifier863202
person.identifier637885
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person.identifier.orcid0000-0003-2170-9003
person.identifier.orcid0000-0003-4060-1057
person.identifier.orcid0000-0002-5403-9352
person.identifier.orcid0000-0001-8323-888X
person.identifier.ridE-9945-2012
person.identifier.ridG-6210-2011
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person.identifier.scopus-author-id6701404110
person.identifier.scopus-author-id8315848300
person.identifier.scopus-author-id8650947800
person.identifier.scopus-author-id7006067269
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
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