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Oxythiohydroxymethylium is considerably lower in
energy than its thioxyhydroxymethylium isomer
according to ab initio calculations. Extensive
millimeter and submillimeter data were reported
by
(1) V. Lattanzi, S. Spezzano, J. C. Laas, J. Chantzos,
L. Bizzocchi, K. L. K. Lee, M. C. McCarthy, and P. Caselli,
2018, Astron. Astrophys. 620, Art. No. A184.
Three low frequency transitions were reported
by
(2) M. C. McCarthy and P. Thaddeus,
2007, J. Chem. Phys. 127, Art. No. 221104.
Calculations should be sufficiently accurate for all
observational purposes. They should be viewed with caution
for a-type transitions with
Ka = 6 and higher or for
transitions with calculated uncertainties of more
than 0.2 MHz.
The dipole moment components of the main isotopolog are
from an ab initio calculation by
(3) S. E. Wheeler, Y. Yamaguchi, and H. F. Schaefer III,
2006, J. Chem. Phys. 124, Art. No. 044322.
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