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A Schiff-Base Bibracchial Lariat Ether Forming a Cryptand-like Cavity for Lanth...
González-Lorenzo, Marina; Platas-Iglesias, Carlos; Avecilla, Fernando; Geraldes, Carlos F. G. C.; Imbert, Daniel; Bünzli, Jean-Claude G.We report here a structural and photophysical study of lanthanide(III) complexes with the di-deprotonated form of the bibracchial lariat ether N,N‘-bis(2-salicylaldiminobenzyl)-1,10-diaza-15-crown-5. The X-ray crystal structures of [Ce(L2-2H)](ClO4)·0.5H2O (2) and [Sm(L2-2H)](ClO4)·C3H8O (5b) show the metal ion being nine-coordinated and deeply buried in the cavity of the dianionic receptor. Thanks to the forma...
Copper complexes with bibracchial lariat ethers: from mono- to binuclear struct...
Rodríguez-Infante, Covadonga; Esteban, David; Avecilla, Fernando; Blas, Andrés de; Rodríguez-Blas, Teresa; Mahía, Jose; Macedo, Anjos L.Copper(II) complexes with a series of bibracchial lariat ethers are described. Independently of the nature of the counterion present (nitrate or perchlorate), the lariat ether N,N'-bis(2-aminobenzyl)-1,10-diaza-15-crown-5 (L1) always forms mononuclear complexes, whereas the lariat ethers N,N'-bis(2-aminobenzyl)-4,13-diaza-18-crown-6 (L2) and N,N'-bis(2-salicylaldiminobenzyl)-4,13-diaza-18-crown-6 (L3) only give...
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