Research article2000Peer reviewed
Density functional study of a weakly hydrogen-bonded benzene-ammonia complex: The importance of the exchange functional
Enkvist, C; Zhang, YK; Yang, WT
Abstract
Density functional theory calculations on the benzene-ammonia complex have been performed. The benzene-ammonia complex is weakly hydrogen bonded, and crucial for obtaining good agreement with experimental results is the choice of the exchange functional used, as in the case of van der Waals interactions. It is found that the behavior of the exchange functional in the region where the density is small and the density gradient large plays an important role in describing the weak hydrogen-bonding interaction. Calculations show that generalized gradient approximation functionals, which behave properly in this region, have achieved an accuracy similar to the second-order Moller-Plesset (MP2) method for the benzene-ammonia complex. (C) 2000 John Wiley & Sons, Inc.
Keywords
benzene-ammonia complex; density functional theory; hydrogen bond; exchange functional; generalized gradient approximation
Published in
International Journal of Quantum Chemistry
2000, Volume: 79, number: 5, pages: 325-329
Publisher: JOHN WILEY & SONS INC
UKÄ Subject classification
Theoretical Chemistry
Publication identifier
DOI: https://doi.org/10.1002/1097-461X(2000)79:5<325::AID-QUA6>3.0.CO;2-B
Permanent link to this page (URI)
https://res.slu.se/id/publ/114689