The impact of the lanthanide contraction on the structure of complexes of a calixarene trisamide
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Nealon, G. and Mocerino, M. and Ogden, M. and Skelton, B. 2009. The impact of the lanthanide contraction on the structure of complexes of a calixarene trisamide. Journal of Inclusion Phenomena and Macrocyclic Chemistry. 65: pp. 25-30.
Journal of Inclusion Phenomena and Macrocyclic Chemistry
Nanochemistry Research Institute
The final publication is available at Springer via 10.1007/s10847-009-9613-y
The syntheses of samarium, holmium, and ytterbium complexes of a tris-amide calixarene are described, and the resulting structures are compared with the previously reported gadolinium complex. The syntheses involved the reaction of 5,11,17,23-tetra-tert-butyl-24-hydroxy-26,27,28- tris(diethylcarbamoylmethoxy)calixarene with the appropriate lanthanide picrate hydrate. Structural studies demonstrated that a picrate anion acts as a quasi-bidentate ligand with Sm (and Gd), is unidentate in the Ho complex, but is found in the second coordination sphere for the smallest lanthanide cation (Yb) investigated.
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