The transition frequencies were taken from
(1) M. Le Guennec, J. Demaison, G. Wlodarczak, and C. J. Marsden, 1993, J. Mol. Spectrosc. 160, 471.
Some higher order parameters were estimated from the CH₂DCCH isotopolog, see c041502.cat.
The calculations should be sufficient for all observational purposes. Caution is advised for transitions having high values of J or K.
The dipole moment was interpolated between values of CH₃CCD and of CD₃CCH, which were taken from
(2) J. S. Muenter, and V. W. Laurie, 1966, J. Chem. Phys., 45, 855.