Anion Coordination Effect on the Nuclearity of Co
<sup>II</sup>
, Ni
<sup>II</sup>
, Cu
<sup>II</sup>
, and Zn
<sup>II</sup>
Complexes with a Benzimidazole Pendant‐Armed Crown
作者:Lea Vaiana、David Esteban‐Gómez、Marta Mato‐Iglesias、Carlos Platas‐Iglesias、Andrés de Blas、Teresa Rodríguez‐Blas
DOI:10.1002/ejic.200800928
日期:2009.1
asymmetric coordination of the metalion inside the macrocyclic cavity is maintained in acetonitrile solution, but translocation of the ZnII ionfrom one end of the macrobicyclic cavity to the second one occurs. However, reaction of L4 with CoII, NiII, or CuII perchlorates in the presence of chloride anions results in the formation of binuclear complexes where the metalion is either five-coordinate in
Metal Ion Complementarity: Effect of Ring‐Size Variation on the Conformation and Stability of Lead(II) and Cadmium(II) Complexes with Pendant‐Armed Crowns
作者:Martín Regueiro‐Figueroa、David Esteban‐Gómez、Carlos Platas‐Iglesias、Andrés de Blas、Teresa Rodríguez‐Blas
DOI:10.1002/ejic.200601220
日期:2007.5
into the crown hole, favouring an anti arrangement of the organic receptor. NMR measurements recorded in acetonitrile solution indicate that increasing the crown size induces a conformational change in the series of CdII complexes. The conformation goes from a syn arrangement for L1 to an anti arrangement for L3, passing through a syn [lrarr2] anti equilibrium in the complexderivedfrom L2. On the
“Cinderella” elements: Strategies to increase the stability of group 1 complexes by tailoring crown macrocycles
作者:Aurora Rodríguez-Rodríguez、Israel Carreira-Barral、David Esteban-Gómez、Carlos Platas-Iglesias、Andrés de Blas、Teresa Rodríguez-Blas
DOI:10.1016/j.ica.2013.11.022
日期:2014.6
Abstract The synthesis and structural characterization of six sodiumcomplexes with bibracchial lariatethers containing aniline or benzimidazole side arms, and derived from 1,7-diaza-12-crown-4, 1,10-diaza-15-crown-5 or 4,13-diaza-18-crown-6, are reported. The X-ray structures of four of these compounds have been obtained. Additionally, the X-ray structures of a sodium macrobicyclic complex derived from
Syntheses of diaza-18-crown-6 ligands containing two units each of 4-hydroxyazobenzene, benzimidazole, uracil, anthraquinone, or ferrocene groups
作者:Ning Su、Jerald S. Bradshaw、Xian X. Zhang、Paul B. Savage、Krzysztof E. Krakowiak、Reed M. Izatt
DOI:10.1002/jhet.5570360332
日期:1999.5
functions were prepared. Diaza-18-crown-6 containing two 4-hydroxyazobenzene (3) or two 4-hydroxy-4′-(dimethyl-amino)azobenzene (4) substituents were prepared via a one-pot Mannich reaction. Diaza-18-crown-6 containing two benzimidazole (5), two uracil (6) or two 9,10-anthraquinone (7) substituents were prepared by treating the diazacrown with the appropriate chloromethyl-containing compound. Reductive