Author： Bernardo Masci
Publisher： Taylor & Francis Ltd
ISSN： 1061-0278
Source： Supramolecular Chemistry, Vol.15, Iss.2, 2003-01, pp. : 101-108
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Abstract
The first crystal structures of a p-tert-butyltetrahomodioxacalix[6]arene comprising two tri-phenolic subunits separated by two ether bridges and two of its complexes with uranyl ions are reported. The doubly deprotonated macrocycle assumes a much elongated, cone-like conformation including two organic species. Two binuclear uranyl complexes are described. In both, each cation is bound to the three phenoxide oxygen atoms of a tri-phenolic subunit and to a central, bridging, carbonate or carbamate ion. The formation of the latter ions from the amines used as bases is discussed.
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