Oxyborane, X 1Σ+
Species tag 028514
Date of EntryJuly 2009
ContributorH. S. P. Müller

The pure rotational data have been reported by
(1) Y. Kawashima, Y. Endo, K.Kawaguchi, and E. Hirota, 1987, Chem. Phys. Lett. 135, 441.
Even though 11B hyperfine structure was resolved only up to J = 2 – 1, the apparent line maxima are somewhat different from the hyperfine-free line centers, though only slightly for only up to J = 5 – 4. Therefore, no transitions have been merged.
The predictions are deemed to be reliable up to about 1.2 THz, possibly higher.
At low J, it is possible to resolve the 11B hyperfine splitting. Therefore, a separate hyperfine calculation up to J' = 5 is provided. Note: The partion function given below takes into account this splitting !
The dipole moment is from an ab initio calculation from
(2) N. J. DeYonker, S. Li, Y. Yamaguchi, H. F. Schaefer, III, T. D. Crawford, R. A. King, and K. A. Peterson, 2005, J. Chem. Phys. 122, Art.-No. 234316.

Lines Listed43
Frequency / GHz< 3348
Max. J43
log STR0-4.0
log STR1-5.0
Isotope Corr.-0.0960
Egy / (cm–1)0.0
 µa / D2.69
 µb / D 
 µc / D 
 A / MHz 
 B / MHz39224.25
 C / MHz 
detected in ISM/CSMno

Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schloeder