Uranyl(VI) complexes with 1+1 asymmetric compartmental ligands containing a Schiff base and a crown ether-like chamber (Articolo in rivista)

Type
Label
  • Uranyl(VI) complexes with 1+1 asymmetric compartmental ligands containing a Schiff base and a crown ether-like chamber (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/S0020-1693(02)01254-9 (literal)
Alternative label
  • Casellato U., Tamburini S., Tomasin P., Vigato P. A. (2002)
    Uranyl(VI) complexes with 1+1 asymmetric compartmental ligands containing a Schiff base and a crown ether-like chamber
    in Inorganica Chimica Acta (Testo stamp.)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Casellato U., Tamburini S., Tomasin P., Vigato P. A. (literal)
Pagina inizio
  • 118 (literal)
Pagina fine
  • 126 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 341 (literal)
Rivista
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ICIS-Istituto di chimica inorganica e delle superfici (literal)
Titolo
  • Uranyl(VI) complexes with 1+1 asymmetric compartmental ligands containing a Schiff base and a crown ether-like chamber (literal)
Abstract
  • The [1+1] asymmetric compartmental ligands H2LA and H2LB, containing a N3O2 Schiff base coordination chamber and an adjacent O2On (n= 3, 4) crown-like coordination chamber, have been prepared by reaction of equimolar amount of 3,3’-(3-oxapentane-1,5-diyldioxy)bis(2hydroxybenzaldehyde (H2LI) or 3,3’-(3,6-dioxaoctane-1,8-diyldioxy)bis(2-hydroxybenzaldehyde) (H2LII) and 1,5-diamino-3-azamethylpentane. These macrocycles react with UO22+ to form the mononuclear complexes [UO2(LA)] and [UO2(LB)]; the same complexes have been obtained by condensation of the above formyl- and amine- precursors in the presence of UO22+ as templating agent. The uranyl(VI) ion invariantly prefers the N3O2 site as evidenced by ir and nmr spectroscopy and confirmed by an x-ray diffractometric investigation or the complex [UO2(LA)]. [UO2(LA)] crystallizes in the monoclinic space group P21/c with four formula units in a cell of dimensions a =10.412(2), b=12.973(3), c = 19.743(4) Å and b = 100.22(3)°. The structure was solved by standard methods and refined by full matrix least squares to the conventional R index of 6.9%. The uranyl(VI) atom presents a classic pentagonal bipyramidal coordination polyhedron with the base formed by three nitrogen and two phenolic oxygen atoms of the cyclic ligand. A detailed 1H and 13C nmr study was carried out in order to compare the structure in solution with that found in the solid state. (literal)
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