A STRUCTURAL-CHANGE BETWEEN THE COMPLEXES OF PRASEODYMIUM AND NEODYMIUM NITRATES WITH 3-PENTAOXACYCLOPENTADEC-2-ENE(STILBENO-15-CROWN-5) - SYNTHESIS AND STRUCTURES OF [PR(NO3)(3) (STILBENO-5-CROWN-5)] AND [ND(NO3)(3) (EO(5))](EO(5) EQUALS TETRAETHYLENEGLYCOL)

Authors
LU TB JI LN TAN MY LIU Y YU KB
Citation
Tb. Lu et al., A STRUCTURAL-CHANGE BETWEEN THE COMPLEXES OF PRASEODYMIUM AND NEODYMIUM NITRATES WITH 3-PENTAOXACYCLOPENTADEC-2-ENE(STILBENO-15-CROWN-5) - SYNTHESIS AND STRUCTURES OF [PR(NO3)(3) (STILBENO-5-CROWN-5)] AND [ND(NO3)(3) (EO(5))](EO(5) EQUALS TETRAETHYLENEGLYCOL), Polyhedron, 16(7), 1997, pp. 1149-1156
Citations number
13
Categorie Soggetti
Chemistry Inorganic & Nuclear",Crystallography
Journal title
Polyhedron → ACNP
ISSN journal
02775387
Volume
16
Issue
7
Year of publication
1997
Pages
1149 - 1156
Database
ISI
SICI code
0277-5387(1997)16:7<1149:ASBTCO>2.0.ZU;2-A
Abstract
A structural change in Ln(NO3)(3) . nH(2)O complexes with stilbeno-15- crown-5 occurs between Ln = Pr and Ln = Nd. The unstable Nd(NO3)(3) . L (L = stilbeno-15-crown-5) can react with formic acid to form stable Nd(NO3)(3) . EO(5). Under the same conditions the stable Pr(NO3)(3) . L cannot be transformed into Pr(NO3)(3) . EO(5). X-ray crystallographi c examinations of these two complexes have been carried out. There are two independent Pr(NO3)(3) . L monomers in one asymmetric unit; in ea ch the coordination number is 11. The tetraethyleneglycol ligand wraps around the neodymium(III) ion in Nd(NO3)(3) . EO(5) and all the three nitrate groups are bidentate. The coordination number is also 11. Cop yright (C) 1997 Elsevier Science Ltd.