Magnetic properties of cyano-bridged Ln3+-M3+ complexes. Part I: Trinuclear complexes (Ln3+ = La, Ce, Pr, Nd, Sm; M3+ = FeLS, Co) with bpy as blocking ligand

Albert Figuerola, Joan Ribas, Miquel Llunell, David Casanova, Miguel Maestro, Santiago Alvarez*, Carmen Diaz

*Corresponding author for this work

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99 Scopus citations


The reaction of Ln(NO3)3(aq) with K 3[Fe(CN)6] or K3[Co(CN)6] and 2,2′-bipyridine in water/ethanol led to eight trinuclear complexes: trans-[M(CN)4(μ-CN)2{Ln(H2O) 4(bpy)2}2][M(CN)6]·8H 2O (M = Fe3+ or Co3+, Ln = La3+, Ce3+, Pr3+, Nd3+, and Sm3+). The structures for the eight complexes [La2Fe] (1), [Ce2Fe] (2), [Pr2Fe] (3), [Nd2Fe] (4), [Ce2Co] (5), [Pr2Co] (6), [Nd2Co] (7), and [Sm2Co] (8) have been solved; they crystallize in the triclinic space group P1 and are isomorphous. They exhibit a supramolecular 3D architecture through hydrogen bonding and π-π stacking interactions. A stereochemical study of the nine-vertex polyhedra of the lanthanide ions, based on continuous shape measures, is presented. No significant magnetic interaction was found between the lanthanide(III) and the iron(III) ions.

Original languageEnglish (US)
Pages (from-to)6939-6948
Number of pages10
JournalInorganic Chemistry
Issue number20
StatePublished - Oct 3 2005

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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