Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Uranyl ion complexation by medium and large homooxacalixarenes: from mono-to poly-uranate complexes
Autore:
Thuery, P; Nierlich, M; Vicens, J; Masci, B;
Indirizzi:
CEA Saclay, CNRS, URA 331, F-91191 Gif Sur Yvette, France CEA Saclay Gif Sur Yvette France F-91191 F-91191 Gif Sur Yvette, France ECPM, Lab Chim Interact Mol Specif, CNRS, UMR 7512, F-67087 Strasbourg, France ECPM Strasbourg France F-67087 NRS, UMR 7512, F-67087 Strasbourg, France Univ La Sapienza, Dipartimento Chim, I-00185 Rome, Italy Univ La SapienzaRome Italy I-00185 partimento Chim, I-00185 Rome, Italy Univ La Sapienza, CNR, Ctr Studio Meccanismi Reaz, I-00185 Rome, Italy Univ La Sapienza Rome Italy I-00185 Meccanismi Reaz, I-00185 Rome, Italy
Titolo Testata:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
fascicolo: 6, , anno: 2001,
pagine: 867 - 874
SICI:
1472-7773(2001):6<867:UICBMA>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
X-RAY-DIFFRACTION; CRYSTAL-STRUCTURE; CALIXARENES; LIGANDS; COORDINATION; CLUSTER; SIZE;
Keywords:
actinides; calixarenes; crown ethers; cryptands; cyclophanes; coordination chemistry; molecular structure; uranyl ion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Thuery, P CEA Saclay, CNRS, URA 331, Bat 125, F-91191 Gif Sur Yvette, France CEA Saclay Bat 125 Gif Sur Yvette France F-91191 Yvette, France
Citazione:
P. Thuery et al., "Uranyl ion complexation by medium and large homooxacalixarenes: from mono-to poly-uranate complexes", J CHEM S DA, (6), 2001, pp. 867-874

Abstract

Crystal structures of dioxouranium(VI) complexes of three homooxacalix[n]arenes (n=4, 6 or 8) have shown the possibility to complex metal moieties ofvariable nuclearity, depending upon the number of phenolic groups and ether links they contain. p-tert-Butyltetrahomodioxacalix[6]arene embraces a single uranyl unit through tetraphenoxide coordination as commonly observed in calixarene complexes, whereas p-methyloctahomotetraoxacalix[4]arene bindsa doubly bridged binuclear species coordinated to both phenoxide and etheroxygen donors, while the large p-tert-butyloctahomotetraoxacalix[8]arene binds a unique tetrauranate cluster containing both double and single oxygenbridges between uranium atoms and involving only phenoxide-oxygen coordination to the macrocycle. An additional crystal structure determination on the triethylammonium complex of the singly deprotonated homooxacalix[6]arene enables some comments to be made on the effects of coordination on the macrocycle conformation. The relation between the nuclearity of the uranyl complexes with ligands in the calixarene/homooxacalixarene family and the size of the ligands is discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 23:52:43