http://www.cnr.it/ontology/cnr/individuo/prodotto/ID200597

Lanthanide complexes with compartmental schiff bases (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Lanthanide complexes with compartmental schiff bases (Articolo in rivista) (literal)

Anno

1987-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/S0020-1693(00)85915-0 (literal)

Alternative label

Guerriero P.; Casellato U.; Tamburini S.; Vigato P.A.; Graziani R. (1987)
Lanthanide complexes with compartmental schiff bases
in Inorganica Chimica Acta (Testo stamp.); Elsevier BV, Amsterdam (Paesi Bassi)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Guerriero P.; Casellato U.; Tamburini S.; Vigato P.A.; Graziani R. (literal)

Pagina inizio

127 (literal)

Pagina fine

138 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://www.sciencedirect.com/science/article/pii/S0020169300859150# (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

129 (literal)

Rivista

Inorganica Chimica Acta (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

13 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

1 (literal)

Note

cience direct - Elsevier (literal)
Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

1,2,3,4 : Istituto di Chimica e Technologia dei Radioelementi C.N.R., Area della Ricerca, Corso Stati Uniti 4, Padua, Italy / 5 : Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Universitá di Padova, Via Loredan 4, Padua, Italy (literal)

Titolo

Lanthanide complexes with compartmental schiff bases (literal)

Abstract

Lanthanide complexes have been prepared with acyclic and cyclic compartmental Schiff bases (H2L) obtained by condensation of 2,6-diformyl-4-chlorophenol and the polyamines NH2(CH2)2X(CH2)2NH2 (X = NH, S). They can be formulated as Ln(L)NO3· nH2O or Ln(H2L)(NO3)3·nH2O (Ln3+ = La, Nd, Sm, Gd, Tb, Dy, Ho, Er, Yb; n = 0-5) and have been obtained by step-by-step reactions, which allow a more appropriate control of the reaction procedure. Template syntheses often produce not well defined complexes. The Schiff bases act as neutral of dinegative chelating ligands according to the experimental conditions employed. When they coordinate as neutral ligands, one ionic and two bidentate nitrate groups are present in the complexes. A ring contraction, through an interanl cyclization, has been observed in the macrocyclic complexes when X = NH (H2Lc). The crystal structure of [Tb(H2Lc)(NO3)2]NO3 was determined by X-ray crystallography. The compound is monoclinic, space group C2/c, with a = 23.668(5), b = 14.328(7), c = 19.482(5) Å and ? = 91.82(5)°; Dc = 1.70 g cm-3 for Z = 8. The structure was refined to R = 0.078. The terbium ion is nona-coordinated in the usual coordination geometry of a distorted tricapped trigonal prism. Two nitrato groups are chelate in approximately bisphenoidal position, the third nitrate being ionic. The organic macrocycle is coordinated through two oxygen and three nitrogen atoms. Selected bond distance are: Tb?O(nitrate) 2.46 Å (mean), Tb?O(ligand) 2.25 Å (mean), Tb?N(ligand) 2.54 Å (mean). (literal)

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