Molecules with New Topologies Derived from Hydrogen-Bonded Dimers of Tetraurea Calix[4]arenes.

Molecules with New Topologies Derived from Hydrogen-Bonded Dimers of Tetraurea Calix[4]arenes. Research Abstract Details 

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Molecules with New Topologies Derived from Hydrogen-Bonded Dimers of Tetraurea Calix[4]arenes. Abstract Text:

Tetraurea calix[4]arenes 2 have been synthesized in which two adjacent aryl urea residues are connected to a loop by an aliphatic chain -O-(CH(2))(n)-O-. The remaining urea residues have a bulky 3,5-di-tert-butylphenyl residue and an omega-alkenyloxyphenyl residue. Since this bulky residue cannot pass through the loop, only one homodimer (22) is formed in apolar solvents, for steric reasons, in which the two alkenyl residues penetrate the two macrocyclic loops. Covalent connection of these alkenyl groups by olefin metathesis followed by hydrogenation creates compounds 3, which consist of molecules with hitherto unknown topology. Their molecular structure was confirmed by (1)H NMR spectroscopy and ESIMS, and for one example by single-crystal X-ray analysis.

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Molecules with New Topologies Derived from Hydrogen-Bonded Dimers of Tetraurea Calix[4]arenes. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Chemistry (Weinheim an der Bergstrasse, Germany)

VOLUME: 14

Page Numbers: 8514-20

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ISSN: 0947-6539

DAY: 1

MONTH: 10

YEAR: 2008

Molecules with New Topologies Derived from Hydrogen-Bonded Dimers of Tetraurea Calix[4]arenes. Information

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LANGUAGE: eng

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AFFILIATION: Abteilung Lehramt Chemie, Fachbereich Chemie, Pharmazie und Geowissenschaften, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55099, Mainz (Germany), Fax: (+49) 613-1392-5419.

Country: Germany

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MEDLINETA: Chemistry

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