Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/6112
Título: Arylhydrazones of barbituric acid: synthesis, coordination ability and catalytic activity of their CoII, CoII/IIIand CuIIcomplexes toward peroxidative oxidation of alkanes
Autor: Palmucci, Jessica
Mahmudov, Kamran T.
Guedes da Silva, Maria deFátima C.
Martins, Luísa Margarida D. R. S.
Marchetti, Fabio
Pettinari, Claudio
Pombeiro, Armando J. L.
Palavras-chave: Chain copper(Ii) complex
Cyclohexane oxidation
Crystal-structures
Iron complexes
Ligands
Derivatives
Dinuclear
Functionalization
Hexanuclear
Precursors
Data: 2015
Editora: Royal Soc Chemistry
Citação: PALMUCCI, Jessica; [et al] - Arylhydrazones of barbituric acid: synthesis, coordination ability and catalytic activity of their CoII, CoII/IIIand CuIIcomplexes toward peroxidative oxidation of alkanes. RSC Advances. ISSN 2046-2069. Vol. 5 (102). 84142-84152, 2015
Resumo: New ortho-substituted arylhydrazones of barbituric acid, 5-(2-(2-hydroxyphenyl)hydrazono) pyrimidine-2,4,6(1H,3H,5H)-trione (H4L1) and the sodium salt of 2-(2-(2,4,6-trioxotetra-hydropyrimidin-5(2H)-ylidene)hydrazinyl) benzenesulfonic acid (H4L2), [Na(H3L2)(mu-H2O)(H2O)(2)](2) (1), were used in the synthesis of Cu-II, Co-II and Co-II/III complexes, [Cu(H2L1)(H2O)(im)]center dot 3H(2)O (im = imidazole) (2), [Co(H2O)(6)] [Co(H2L1)(2)](2)center dot 8H(2)O (3), [Co(H2L2)(im)(3)] (4), [Cu(H2L2)(im)(2)]center dot H2O (5) and [Co(H2O)(6)][H3L2](2)center dot 8H(2)O (6). The complexes are water soluble and the mono-or di-deprotonated ligands display different coordination modes, depending on the synthetic conditions. The electrochemical behaviour of all the compounds was investigated by cyclic voltammetry and controlled potential electrolysis, revealing that the ligands are also redox active. All the compounds were evaluated as catalysts for the peroxidative (with H2O2) oxidation of cyclohexane at room temperature. The compounds 2 and 3 are the most active ones (yields up to 21% and TON up to 213 are achieved, in the presence of 3).
Peer review: yes
URI: http://hdl.handle.net/10400.21/6112
DOI: 10.1039/C5RA14078A
ISSN: 2046-2069
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Arylhydrazones of barbituric acid.pdf1,23 MBAdobe PDFVer/Abrir    Acesso Restrito. Solicitar cópia ao autor!


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.