Methylamine vibration-rotation-tunneling energy levels in the Kleiner-Hougen formalism

Details: Each energy level is characterized by the asymmetric-top quantum numbers J, K_a, and K_c, together with the overall torsion–wagging–rotation symmetry species Γ, corresponding to an irreducible representation of the permutation–inversion group G₁₂. When table includes hyperfine levels, the standard quantum number F = J + I is included in the level designation.

The correspondence between the integer symmetry identifier Sym used in the .cat file and the symmetry species Γ is summarized in the table below.