| Téléchargement | - Voir le manuscrit accepté : Communication: Single crystal x-ray diffraction observation of hydrogen bonding between 1-propanol and water in a structure II clathrate hydrate (PDF, 714 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1063/1.3574393 |
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| Auteur | Rechercher : Udachin, Konstantin; Rechercher : Alavi, Saman; Rechercher : Ripmeester, John A.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut Steacie des sciences moléculaires du CNRC
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| Format | Texte, Article |
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| Résumé | Single crystal x-ray crystallography is used to detect guest–host hydrogen bonding in structure II (sII) binary clathrate hydrate of 1-propanol and methane. X-ray structural analysis shows that the 1-propanol oxygen atom is at a distance of 2.749 and 2.788 Å from the closest clathrate hydrate water oxygen atoms from a hexagonal face of the large sII cage. The 1-propanol hydroxyl hydrogen atom is disordered and at distances of 1.956 and 2.035 Å from the closest cage water oxygen atoms. These distances are compatible with guest–water hydrogen bonding. The C–C–C–O torsional angle in 1-propanol in the cage is 91.47° which corresponds to a staggered conformation for the guest. Molecular dynamics studies of this system demonstrated guest–water hydrogen bonding in this hydrate. The molecular dynamics simulations predict most probable distances for the 1-propanol–water oxygen atoms to be 2.725 Å, and the average C–C–C–O torsional angle to be ∼59° consistent with a gauche conformation. The individual cage distortions resulting from guest–host hydrogen bonding from the simulations are rather large, but due to the random nature of the hydrogen bonding of the guest with the 24 water molecules making up the hexagonal faces of the large sII cages, these distortions are not observed in the x-ray structure. |
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| Date de publication | 2011-03-29 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 19727317 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | bafe5b26-a0e0-4c0c-8e2d-e301e14a4f66 |
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| Enregistrement créé | 2012-03-29 |
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| Enregistrement modifié | 2020-04-21 |
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