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Hydrogen Bonded Arrays: The Power of Multiple Hydrogen Bonds.
- Source :
-
Journal of the American Chemical Society . 2/1/2012, Vol. 134 Issue 4, p2094-2099. 6p. - Publication Year :
- 2012
-
Abstract
- Hydrogen bond interactions in small covalent model compounds (i.e., deprotonated polyhydroxy alcohols) were measured by negative ion photoelectron spectroscopy. The experimentally determined vertical and adiabatic electron detachment energies for (HOCH2CH2)2CHO-(2a), (HOCH2CH2)3CO- (3a), and (HOCH2CH2CH(OH)CH2)3CO- (4a)reveal that hydrogen-bonded networks can provide enormous stabilizations and that a single charge center not only can be stabilized by up to three hydrogen bonds but also can increase the interaction energy between noncharged OH groups by 5.8 kcal mol-1 or more per hydrogen bond. This can lead to pKa values that are very different from those in water and can provide some of the impetus for catalytic processes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027863
- Volume :
- 134
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 71532156
- Full Text :
- https://doi.org/10.1021/ja2081907