Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/20066
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dc.contributor.authorAmarante, Tatiana R.pt
dc.contributor.authorNeves, Patriciapt
dc.contributor.authorAlmeida Paz, Filipe A.pt
dc.contributor.authorValente, Anabela A.pt
dc.contributor.authorPillinger, Martynpt
dc.contributor.authorGoncalves, Isabel S.pt
dc.date.accessioned2017-12-07T19:34:19Z-
dc.date.issued2014pt
dc.identifier.issn1477-9226pt
dc.identifier.urihttp://hdl.handle.net/10773/20066-
dc.description.abstractTreatment of the solvent adduct [MoO2Cl2(THF)(2)] with the ligand 2-(1-pentyl-3-pyrazolyl)pyridine (1, abbreviated as pent-pp) gave the dioxomolybdenum(VI) complex [MoO2Cl2(pent-pp)] (2), which was characterised by elemental analysis, H-1 NMR, FT-IR spectroscopy and single crystal X-ray diffraction (XRD). Reaction of 2 with water in a Teflon-lined stainless steel autoclave at 100 degrees C led to the isolation of a molybdenum oxide/pyrazolylpyridine hybrid material with the composition [Mo2O6(pent-pp)] (3), which was characterised by variable temperature powder XRD, scanning electron microscopy, thermogravimetric analysis, FT-IR and C-13{H-1} CP MAS NMR spectroscopies. Compounds 2 and 3 display high activity and selectivity when used as (pre) catalysts for the epoxidation of cis-cyclooctene at 55 degrees C with tert-butylhydroperoxide as an oxidant. Further catalytic experiments with 3 as a (pre) catalyst were performed using the bio-derived olefins DL-limonene (Lim) and methyl oleate (Ole). The reaction of Lim gave mainly 1,2-epoxy-p-menth-8-ene and 1,2; 8,9-diepoxy-p-menthane in a combined yield of 93% at 97% conversion (6 h), while the reaction of Ole led to 9,10-epoxystearate as the main product in 78% yield at 82% conversion (6 h). The catalytic reactions are homogeneous in nature. Starting with material 3, the oxodiperoxo complex [MoO(O-2)(2)(pent-pp)] (4) was isolated from solution after a catalytic run, suggesting that it is formed from 3 and plays a catalytic role.pt
dc.language.isoengpt
dc.publisherROYAL SOC CHEMISTRYpt
dc.relationinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/121677/PTpt
dc.relationinfo:eu-repo/grantAgreement/FCT/COMPETE/132936/PTpt
dc.relationinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F73540%2F2010/PTpt
dc.relationinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F64224%2F2009/PTpt
dc.rightsrestrictedAccesspor
dc.subjectCAMBRIDGE STRUCTURAL DATABASEpt
dc.subjectBOND-VALENCE PARAMETERSpt
dc.subjectCRYSTAL-STRUCTUREpt
dc.subjectDIOXOMOLYBDENUM(VI) COMPLEXESpt
dc.subjectCYCLOOCTENE EPOXIDATIONpt
dc.subjectMOLYBDENUM(VI) COMPLEXpt
dc.subjectHYDROTHERMAL SYNTHESISpt
dc.subjectEFFICIENT CATALYSTSpt
dc.subjectORGANIC-SYNTHESISpt
dc.subjectDIOXO COMPLEXESpt
dc.titleInvestigation of a dichlorodioxomolybdenum(VI)-pyrazolylpyridine complex and a hybrid derivative as catalysts in olefin epoxidationpt
dc.typearticlept
dc.peerreviewedyespt
ua.distributioninternationalpt
degois.publication.firstPage6059pt
degois.publication.issue16pt
degois.publication.lastPage6069pt
degois.publication.titleDALTON TRANSACTIONSpt
degois.publication.volume43pt
dc.date.embargo10000-01-01-
dc.relation.publisherversion10.1039/c3dt52981apt
dc.identifier.doi10.1039/c3dt52981apt
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