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.
F is the quantum number associated with the total angular momentum including nuclear spin: F = J + I1 if only one such coupling is resolved, F = Fj-1 + Ij if two or more such couplings are resolved.
Fj is the intermediate angular momentum quantum number associated with the coupling of the nuclear spin angular momentum of nucleus j to the intermediate angular momentum: F1 = J + I1 or Fj = Fj-1 + Ij; Fj 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.
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.
l is the total vibrational angular momentum quantum number associated with resultant vibrational angular momentum about the internuclear axis.
li is the vibrational angular momentum quantum number associated with the degenerate νi normal mode; positive and negative values distinguish l–type doubling components.
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.
vi is the vibrational quantum number associated with the νi normal mode.
vibInv is the parity of the vibrational wavefunction with respect to inversion through the molecular centre of mass in the molecular coordinate system.
vibRefl is the parity of the vibrational wavefunction with respect to reflection in a plane containing the molecular symmetry axis in the molecular coordinate system.
vibSym is the symmetry species of the vibrational wavefunction, in some appropriate symmetry group.