Guest-enhanced kinetic stability of hydrogen-bonded dimeric capsules of tetraurea calix[4]arenes

Authors
Vysotsky, MO Bohmer, V
Citation
Mo. Vysotsky et V. Bohmer, Guest-enhanced kinetic stability of hydrogen-bonded dimeric capsules of tetraurea calix[4]arenes, ORG LETT, 2(23), 2000, pp. 3571-3574
Citations number
18
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANIC LETTERS
ISSN journal
15237060 → ACNP
Volume
2
Issue
23
Year of publication
2000
Pages
3571 - 3574
Database
ISI
SICI code
1523-7060(20001116)2:23<3571:GKSOHD>2.0.ZU;2-V
Abstract
[GRAPHICS] Inclusion complexes of self assembled molecular dimers composed of two tetr atolylurea calix[4]arenes show strongly different kinetic stability for dif ferent guests. In cyclohexane d(12) half life times for the exchange of a g uest against the solvent vary from 2.9 h (chloroform) through 20 h (benzene ) and 74 h (fluorobenzene) to 78 days for cyclohexane. This demonstrates th at the kinetic stability of such a dimer can be strongly increased by the c hoice of a suitable guest.