Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Theoretical Study of Hydrogen Bonding in Homodimers and Heterodimers of Amide, Boronic Acid, and Carboxylic Acid, Free and in Encapsulation Complexes
Δημιουργός/Συγγραφέας:	[EL] Τζέλη, Δήμητρα[EN] Tzeli, Demeter [EL] Θεοδωρακοπούλου, Γιαννούλα[EN] Theodorakopoulos, Giannoula [EL] Πετσαλάκης, Ιωάννης Δ.[EN] Petsalakis, Ioannis D. Ajami, Dariush Rebek, Julius
Εκδότης:	John Wiley & Sons, Inc.
Τόπος έκδοσης:	WASHINGTON
Ημερομηνία:	2011-10-26
Γλώσσα:	Αγγλικά
ISSN:	0002-7863
DOI:	10.1021/ja206555d
Περίληψη:	The homodimers and the heterodimers of two amides, two boronic acids, and two carboxylic acids have been calculated in the gas phase and in N,N-dimethylformamide (DMF) and CCl4 solvents using the DFT (M06-2X and M06-L) and the MP2 methods in conjunction with the 6-31G(d,p) and 6-311+G(d,p) basis sets. Furthermore, their pairwise coencapsulation was studied to examine its effect on the calculated properties of the hydrogen bonds at the ONIOM[M06-2X/6-31G(d,p);PM6], ONIOM[MP2/6-31G(d,p); PM6], and M06-2X/6-31G(d,p) levels of theory. The present work is directed toward the theoretical rationalization and interpretation of recent experimental results on hydrogen bonding in encaptulation complexes [D. Ajami et al. J. Am. Chem. Soc. 2011, 133, 9689-9691]. The calculated dimerization energy (Delta E) values range from 0.74 to 0.35 eV for the different dimers in the gas phase, with the ordering carboxylic homodimers > amide-carboxylic dimers > amide homodimers > boronic-carboxylic dimers > amide-boronic dimers > boronic homodimers. In solvents, generally smaller Delta E values are calculated with only small variations in the ordering. In the capsule, the Delta E values range between 0.67 and 0.33 eV with practically the same ordering as in the gas phase. The calculated % distributions of the encapsulated dimers, taking into account statistical factors, are in agreement with the experimental distribution, where the occurrence of boronic homodimer dominates, even though it is calculated to have the smallest Delta E.
Τίτλος πηγής δημοσίευσης:	Journal of the American Chemical Society
Τόμος/Κεφάλαιο:	133
Τεύχος:	42
Σελίδες:	16977-16985
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General)
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© AMER CHEMICAL SOC
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://pubs.acs.org/journals/jacsat/index.html
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο