Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1234245 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2010 | 5 Pages |
Abstract
An extensive HF, MP2, B3LYP and CCSD study of the molecular structure, force field and normal vibrations has been carried out for the hydrogen cyanide compound with boron tribromide. Most of the calculations agree that the HCN-BBr3 molecule belongs to C3v point group and has a N-B length of 1.55-1.70Â Ã
and a N-B-Br angle of 103-105°. These calculations also have estimated the missing low-wavenumber fundamentals in the 190 (ν5), 150 (ν9) and 105 cmâ1 (ν10) regions, instead of the supposed fundamentals at 207, 188 and 150 cmâ1, respectively, based on the combination bands. The quantum chemical force constants, by the B3LYP/6-31G and CCSD/3-21G calculations, have been adjusted by the scaling factors to reproduce the fundamentals in the literature [3] to include the bands below 200 cmâ1 proposed in this study. Normal coordinate analysis using the scaled force constants has been performed to interpret the molecular vibrations of four isotopic molecules, HCN-10BBr3, HCN-11BBr3, DCN-10BBr3 and DCN-11BBr3.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Y. Hase,