The syntheses of dinuclear calcium perchlorate and/or nitrate complexes by template and direct methods, employing macrocyclic ligands with 18, 20, 22, and 26 membered rings are reported. The presence of pendant arms provide with coordinative NxOy donor atoms in the smaller macrocycles, the high number of donor atoms between 7 and 10, and the dinuclear composition obtained in all the systems examined, point out that in the formed solid complexes both Ca 2+ ions could be located inside of the macrocycle cavities. Transmetallation reaction of a lanthanide(III) complex, [L5Sm] (ClO4)3·9H2O, with Ca(ClO 4)2·xH2O leads the formation of the new dinuclear orange [L5Ca2](ClO4) 4·3H2O complex, manifesting the versatility of this macrocyclic cavity. All complexes have been characterized by microanalysis, IR, UV-vis, 1H NMR spectroscopy, FAB mass spectrometry, FAAS spectroscopy, and conductivity measurements.
|Number of pages||7|
|Journal||Zeitschrift Fur Anorganische Und Allgemeine Chemie|
|Publication status||Published - 1 Oct 2004|