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Table 2.

Transitions included in the fit of vt = 0, 1 states.

ma J Ka Kc ma J Ka Kc Freq. meas. (MHz) Uncert. (MHz) Obs.-cal. (MHz)
−2 19 10 10 −2 18 10 9 164450.2470 0.0500 0.0258
0 19 4 16 0 18 4 15 164453.2689 0.0500 0.0129
1 19 4 15 1 18 4 14 164453.6215 0.0500 −0.0132
1 19 4 16 1 18 4 15 164462.9970 0.0500 0.0028
0 19 4 15 0 18 4 14 164463.8299 0.0500 −0.0093
−2 19 4 16 −2 18 4 15 164479.1550 0.0500 −0.0171
1 19 9 10 1 18 9 9 164489.9111 0.0500 −0.0217
1 19 9 11 1 18 9 10 164493.2535 0.0500 −0.0358
0 19 3 17 0 18 3 16 164493.5134 0.0500 −0.0414
−3 19 9 10 −3 18 9 9 164501.8950 0.0500 0.0058
−3 19 9 11 −3 18 9 10 164501.8950 0.0500 0.0058
−2 19 13 6 −2 18 13 5 164511.8920 0.1000 0.0078

Notes. The complete table is available at the CDS.

(a)

RAM36 code uses the free rotor quantum number m for labeling torsional energy levels (Ilyushin et al. 2010; Belloche et al. 2017). For a molecule with three-fold barrier the A and E symmetry levels are labeled respectively as m = 0, and m = 1 for the ground state, as m = −3 and m = −2 for the first excited torsional state and as m = 3 and m = 4 for the second.

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