asSym is (for molecules with a centre of inversion) the symmetry of the rovibronic wavefunction: 'a' or 's' such that the total wavefunction including nuclear spin is symmetric or antisymmetric with respect to permutation of identical nuclei (P12), according to whether they are bosons or fermions respectively.
ElecStateLabel is a label identifying the electronic state: X, A, a, B, etc.
elecSym is the symmetry species of the electronic wavefunction described by some symmetry group.
F is the quantum number associated with the total angular momentum including nuclear spin: F = J + I1 if only one hyperfine coupling is resolved, F = F1 + I2 if two couplings are resolved, or F = F2 + I3 if all three couplings are resolved.
F1 is the intermediate angular momentum quantum number associated with the coupling of the rotational angular momentum and nuclear spin of nucleus 1 where two or three such couplings are resolved: F1 = J + I1; F1 is often not a good quantum number.
F2 is the intermediate angular momentum quantum number associated with the coupling of the rotational angular momentum and nuclear spin of nucleus 2 where three such couplings are resolved: F2 = F1 + I2; F2 is often not a good quantum number.
I is a nuclear spin quantum number corresponding to the coupling of the nuclear spin angular momenta of two or more identical nuclei, I = I1 + I2 + ....
J is the quantum number associated with the total angular momentum excluding nuclear spin, J.
Ka is the rotational quantum label of an asymmetric top molecule, correlating to K in the prolate symmetric top limit.
Kc is the rotational quantum label of an asymmetric top molecule, correlating to K in the oblate symmetric top limit.
kronigParity is the 'rotationless' parity: the parity of the total molecular wavefunction excluding nuclear spin and rotation with respect to inversion through the molecular centre of mass of all particles' coordinates in the laboratory coordinate system. For integer J, total parity is +(-1)J for 'e' states and -(-1)J for 'f' states.
N is the quantum number associated with the total angular momentum excluding electronic and nuclear spin, N: J = N + S.
parity is the total parity: the parity of the total molecular wavefunction (excluding nuclear spin) with respect to inversion through the molecular centre of mass of all particles' coordinates in the laboratory coordinate system, the E* operation.
r is a named, positive integer label identifying the state if no other good quantum numbers or symmetries are known.
S is the quantum number associated with the total electronic spin angular momentum, S.
v1 is the vibrational quantum number associated with the ν1 normal mode.
v2 is the vibrational quantum number associated with the ν2 normal mode.
v3 is the vibrational quantum number associated with the ν3 normal mode.