Abstract
The microwave spectrum of methylamine in its ground vibrational state is critically reviewed and supplemented with spectral frequency calculations derived from rotation-internal rotation-inversion analysis. The review covers the frequency range from 1to500GHz and includes the transitions with rotational quantum number J from 0 to 30. The calculated frequency with uncertainty at the 95% confidence limit along with the lower state energy and line strength are presented. For J⩽10 transitions and some J>10 transitions exhibiting large hyperfine splittings, the quadrupole hyperfine structure is also tabulated.
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