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Dimerization of ketene leads to diketene, a cyclic
molecule. The experimental data were taken
from
(1) V. L. Orr, B. J. Esselman, P. M. Dorman,
B. K. Amberger, I. A. Guzei, R. C. Woods,
and R. J. McMahon,
2016, J. Phys. Chem. A 120, 7753;
and from
(2) F. Mönning, H. Dreizler, and H. D. Rudolph,
1967, Z. Naturforsch. A 22, 1471.
The implicitely assumed uncertainties were
used for the data from (1), 20 kHz for the
data from (2).
The predictions are deemed to be sufficient for all
needs of astronomers. Predictions with uncertainties
larger than 0.3 MHz should be viewed with
caution.
The dipole moment was taken from (2).
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