Rotational Spectra of Symmetric Top Molecules in Ground and Different Vibrational Excited States, and Phenomenon of Resonance – Applying in CF(3)CCH

This paper deals with review of exploration of resonance in symmetric top molecules in different vibrational excited states, v(t) = n (n =1, 2, 3, 4). Calculations for CF(3)CCH shows that resonance take place at [Formula: see text] and [Formula: see text] for v(10) = 2 and v(10) = 3 respectively. In order to account for splitting about 3 MHz for the − 2 series in v(10) = 4 is necessary to introduce the element 〈 J,k, ℓ|f(24)| J,k + 2, ℓ − 4〉 in fitting program.