 |
 |
|
Brotin, T., Devic, T., Lesage, A., Emsley, L. & Collet, A. (2001) Synthesis of denterium-labeled cryptophane-A and investigation of Xe@Cryptophane complexation dynamics by 1D-EXSY NMR experiments. CHEMISTRY-A EUROPEAN JOURNAL, 7 1561–1573.
Added by: Richard Baschera (2017-03-01 08:48:24) |
| Type de référence: Article DOI: {10.1002/1521-3765(20010401)7:7<1561::AID-CHEM1561>3.3.CO;2-0} Numéro d'identification (ISBN etc.): {0947-6539} Clé BibTeX: Brotin{2001} Voir tous les détails bibliographiques  |
Catégories: HORSIMN Créateurs: Brotin, Collet, Devic, Emsley, Lesage Collection: {CHEMISTRY-A EUROPEAN JOURNAL} |
Consultations : 1/483
Indice de consultation : 4% Indice de popularité : 1% |
| Résumé |
|
{We present the synthesis of a series of deuterated cryptophanes 2-6 by a slightly modified procedure used for cryptophane-A. We show that for {[}Xe@cryptophane] complexes the use of variable-temperature one-dimensional Xe-129 magnetization transfer (1D-EXSY) allows the measurement of exchange rates. From these data the decomplexation activation energy E-a has been estimated to be 37.5 +/- 2 kJ mol(-1) The decomplexation activation enthalpy, DeltaH dagger = 35.5 +/- 2 kJ mol(-1), and entropy, DeltaS dagger = - 60 +/- 5 J mol(-1) K-1, have also been calculated. The calculated negative activation entropy suggests that the activated complex associated with decomplexation is conformationally more strained than the complex in its ground state.}
Added by: Richard Baschera |