Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/5233
DC Field | Value | Language |
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dc.contributor.author | Justino, Licínia L. G. | - |
dc.contributor.author | Ramos, M. Luísa | - |
dc.contributor.author | Caldeira, M. Madalena | - |
dc.contributor.author | Gil, Victor M. S. | - |
dc.date.accessioned | 2008-09-01T15:06:14Z | - |
dc.date.available | 2008-09-01T15:06:14Z | - |
dc.date.issued | 2000 | en_US |
dc.identifier.citation | Inorganica Chimica Acta. 311:1-2 (2000) 119-125 | en_US |
dc.identifier.uri | https://hdl.handle.net/10316/5233 | - |
dc.description.abstract | Multinuclear (1H, 13C, 17O, 51V) 1D and 2D NMR spectroscopy has been used to characterize the peroxovanadium(V) complexes of glycolic acid in aqueous solution. One 2:2:2 (metal:ligand:peroxo) complex, together with a 1:1:1 and a 2:2:1 species, are found in the pH range 1-7. The 2:2:2 complex is a monoperoxo (one peroxide unit per vanadium atom) dinuclear species having a V2O3 4+ seven-coordinated metal centre. In this structure, the two vanadium atoms are triple bridged, two of those bridges being formed by oxygen atoms of the hydroxyl group of the acid. The 1:1:1 species has a seven-coordinated VO3+ metal centre. Glycolic acid bonds to the vanadium atoms in a bidentate way, through both the carboxylic and the hydroxyl groups. The peroxo groups are bound in the equatorial plane relative to the apical V=O and the geometry around each vanadium atom is close to pentagonal bipyramidal. The 2:2:1 complex is similar to the 2:2:2 species, except for one of the vanadium centres, which is now a five-coordinated oxovanadium centre. Three additional complexes are found in very small amounts for some pH and concentration conditions. Further support for the proposal of monoperoxovanadium species is given by UV-visible spectroscopy results. | en_US |
dc.description.uri | http://www.sciencedirect.com/science/article/B6TG5-428111H-J/1/b102dece7ebb3928c267e236534a1c50 | en_US |
dc.format.mimetype | aplication/PDF | en |
dc.language.iso | eng | eng |
dc.rights | openAccess | eng |
dc.subject | Peroxovanadium(V) complexes | en_US |
dc.subject | Glycolic acid | en_US |
dc.subject | Multinuclear NMR | en_US |
dc.title | Peroxovanadium(V) complexes of glycolic acid as studied by NMR spectroscopy | en_US |
dc.type | article | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | Com Texto completo | - |
item.languageiso639-1 | en | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.orcid | 0000-0002-8338-6441 | - |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
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file3ca6e68b666c49f699cfa9093a3178cf.pdf | 107.24 kB | Adobe PDF | View/Open |
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