Page 297 - Instant notes
P. 297
Molecular orbital theory of diatomic molecules II 283
Fig. 5. Parity relationships for some
molecular orbitals. The center of
inversion is denoted by X.
Term symbols
As with the distributions of electrons in atomic orbitals, the distribution of electrons in
molecular orbitals may be denoted with the use of a term symbol. The total spin angular
momentum quantum number, Σ, describes the overall spin of the electrons in the
molecule, and is quoted as its multiplicity, (2Σ+1). A closed shell has Σ=0, and a
