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Synthesis and structural characterization of iron complexes with 2,2,2-tris(1-pyrazolyl)ethanol ligands: Application in the peroxidative oxidation of cyclohexane under mild conditions

2011-03-15Journal article Open access
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dc.contributor.authorSilva, Telma F. S.
dc.contributor.authorGuedes Da Silva, M. Fátima C.
dc.contributor.authorMishra, Gopal
dc.contributor.authorMartins, Luisa
dc.contributor.authorPombeiro, Armando
dc.date.accessioned2013-02-17T13:08:27Z
dc.date.available2013-02-17T13:08:27Z
dc.date.issued2011-03-15
dc.description.abstractThe reactions of FeCl2 center dot 2H(2)O and 2,2,2-tris(1-pyrazolyl) ethanol HOCH2C(pz)(3) (1) (pz = pyrazolyl) afford [Fe{HOCH2C(pz)(3)}(2)][FeCl4]Cl (2), [Fe{HOCH2C(pz)(3)}(2)](2)[Fe2OCl6](Cl)(2)center dot 4H(2)O (3 center dot 4H(2)O), [Fe{HOCH2C(pz)(3)}(2)] [FeCl{HOCH2C(pz)(3)}(H2O)(2)](2)(Cl)(4) (4) or [Fe{HOCH2C(pz)(3)}(2)]Cl-2 (5), depending on the experimental conditions. Compounds 1-5 were isolated as air-stable crystalline solids and fully characterized, including (1-4) by single-crystal X-ray diffraction analyses. The latter technique revealed strong intermolecular H-bonds involving the OH group of the scorpionate 2 and 3 giving rise to 1D chains which, in 3, are further expanded to a 2D network with intercalated infinite and almost plane chains of H-interacting water molecules. In 4, intermolecular pi center dot center dot center dot pi interactions involving the pyrazolyl rings are relevant. Complexes 2-5 display a high solubility in water (S-25 degrees C ca. 10-12 mg mL(-1)), a favourable feature towards their application as catalysts (or catalyst precursors) for the peroxidative oxidation of cyclo-hexane to cyclohexanol and cyclohexanone, with aqueous H2O2/MeCN, at room temperature (TON values up to ca. 385). (C) 2011 Elsevier B. V. All rights reserved.por
dc.identifier.citationSILVA, Telma F. S.; GUEDES DA SILVA, M. Fátima; MISHRA, Gopal S.; MARTINS, Luísa M. D. R. S.; POMBEIRO, Armando J. L. - Synthesis and structural characterization of iron complexes with 2,2,2-tris(1-pyrazolyl)ethanol ligands: application in the peroxidative oxidation of cyclohexane under mild conditions. Journal of Organometallic Chemistry. ISSN 0022-328X. Vol. 696, N.º 6 (2011) p.1310-1318por
dc.identifier.issn0022-328X
dc.identifier.urihttp://hdl.handle.net/10400.21/2251
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science SApor
dc.subjectCyclohexanepor
dc.subjectScorpionatespor
dc.subjectIronpor
dc.subjectCatalysispor
dc.subjectOxidationpor
dc.subjectX-ray diffractionpor
dc.subjectCopper triethanolamine complexespor
dc.subjectOrganic molecular-crystalspor
dc.subjectHidrogen-peroxidepor
dc.subjectCatalytic-activitypor
dc.subjectRhenium complexespor
dc.subjectWater clusterspor
dc.subjectHydrocarbon oxygenationspor
dc.subjectCoordination chemistrypor
dc.subjectAlkane hydroxylationpor
dc.subjectZN-IIpor
dc.titleSynthesis and structural characterization of iron complexes with 2,2,2-tris(1-pyrazolyl)ethanol ligands: Application in the peroxidative oxidation of cyclohexane under mild conditionspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceLausannepor
oaire.citation.endPage1318por
oaire.citation.issue6por
oaire.citation.startPage1310por
oaire.citation.titleJournal of Organometallic Chemistrypor
oaire.citation.volume696por
person.familyNameGuedes da Silva
person.familyNameMishra
person.familyNameMartins
person.familyNamePombeiro
person.givenNameM. Fátima C.
person.givenNameGopal
person.givenNameLuisa
person.givenNameArmando
person.identifier789079
person.identifier637885
person.identifier.ciencia-id7619-8E8E-979A
person.identifier.ciencia-id4814-2CD6-F93E
person.identifier.ciencia-idE218-E297-A4EA
person.identifier.ciencia-id8311-38FA-CEFB
person.identifier.orcid0000-0003-4836-2409
person.identifier.orcid0000-0001-6566-7218
person.identifier.orcid0000-0002-5403-9352
person.identifier.orcid0000-0001-8323-888X
person.identifier.ridH-8274-2012
person.identifier.ridG-6210-2011
person.identifier.ridI-5945-2012
person.identifier.scopus-author-id6701761571
person.identifier.scopus-author-id7102625692
person.identifier.scopus-author-id8650947800
person.identifier.scopus-author-id7006067269
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
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