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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/25380
Title: Ab initio study of ion-ammonia complexes: Geometry and many-body interactions
Authors: Teerakiat Kerdcharoen
Supot Hannongbua
Mahidol University
Chulalongkorn University
Keywords: Chemistry;Physics and Astronomy
Issue Date: 3-Sep-1999
Citation: Chemical Physics Letters. Vol.310, No.3-4 (1999), 333-341
Abstract: Ion-ammonia complexes, M(NH3)n, where M=Li+, Na+, K+, Be2+, Mg2+, Ca2+and Al3+, and n=1, 2, 3, 4 and 6, were studied using quantum chemical calculations at the Hartree-Fock, density functional (B3LYP) and MP2 levels. The geometry, binding energies and many-body interactions were studied. It was found that many-body interactions for M(NH3)6amount to 26, 20, 14, 42, 29, 19 and 41% of the pair interaction energy, where M=Li+, Na+, K+, Be2+, Mg2+, Ca2+and Al3+, respectively. Although B3LYP is in good agreement with MP2 in predicting geometry, it overestimates the interaction energies. Electron correlation based on the MP2 approximation was found to be insignificant in calculating the percent error of the pair potential.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0001089235&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/25380
ISSN: 00092614
Appears in Collections:Scopus 1991-2000

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