Design and synthesis of cyanido-bridged d–f molecular assemblies, often accessible via self-assembly of anionic building-block [M(CN)6]3− and lanthanide ions in the presence of blocking ligands, is of significant utility in the preparation of molecule-based magnets. The ability of the cyanido ligand to link various metal ions leads to a wide diversity of structural architectures ranging from discrete polynuclear complexes to fascinating three-dimensional

The synthesis and characterization of two new iron(II) complexes, [Fe(pca)2(py)2]·py (1) and {[Fe(pca)2(H2O)]·H2O}n (2) and one new iron(III) complex, Na2{[Fe(pca)3)]2O}·2H2O·2CH3CN (3) (pca– stands for 2-pyrazinecarboxylate), are reported. Complex 1 is obtained from the reaction of iron powder with 2-pyrazinecarboxylic acid. The reaction of Fe(ClO4)3·10H2O with Hpca in the presence of 3 equiv. of Bu4NOH yields 2, whereas the presence of NaOH

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