Open AccessStructure and potential energy functionof XF2(X=B,N) molecular ground state
Author(s) -
肖夏杰,
韩晓琴,
刘玉芳
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.063102
Subject(s) - ground state , potential energy , physics , basis (linear algebra) , energy (signal processing) , potential energy surface , atomic physics , molecule , molecular physics , geometry , mathematics , quantum mechanics
Based on the Gaussian03 calculation software, QCISD method is used to optimize the possible ground-state structures of XF2(X=B,N) molecules with the different basis sets. On this basis, the resonant frequencies and force constants are calculated with the D95(df, pd) and D95+(df, pd) basis sets respectively. The potential energy functions of XF2(X=B,N) are derived from the many-body expansion theory. At the same time, according to the potential energy functions, three equivalent potential energy diagrams for the XF2(X=B,N) ground states are drawn. The potential energy surface is verified to be consistent with the three atomic molecular geometry. The structures and the features of XF2(X=B,N) can correctly reappear on the potential surface.