The method of localized charge distributions is used to analyze the difference in hydrogen-bond strength between H O ΠΈΠΈΠΈ HOH and H O ΠΈΠΈΠΈ HF in terms of 2 2 the competition between the electronic kinetic energy and the potential energy. The main source of the difference is a relatively larger decrea
Toward a general protocol for the study of static and dynamic properties of hydrogen-bonded systems
β Scribed by Vincenzo Barone; Carlo Adamo
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 260 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0020-7608
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β¦ Synopsis
We report a critical assessment of the building blocks constituting a general protocol for the study of the structure, strength, and kinetics of hydrogen bridges in large biological systems. The potentialities of self-consistent hybrid approaches for computing reliable potential energy surfaces are described and validated for a number of model systems. Combined discrete-continuum models for studying environmental effects are introduced and applied to some case studies. Finally, some aspects about the role of tunneling are discussed.
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The numerous accurate structural data of cobalamins now available allows us to optimize the geometry of these systems, based on a simplified model by using density functional theory (DFT) calculations. This approach, which reproduces the trend of the experimental distances derived from EXAFS and X-r
Whenever hydrogen bonding is involved in molecular recognition, the possibility of a proton transfer from the donor to the acceptor arises. In most cases the pK a of the donor is far enough above the pK a of the conjugate acid of the acceptor for it to be clear that no proton transfer will occur. Ho