What are spin selection and Laporte selection rule ?answer for 3 marks.plzz answer today.

The Laporte rule is a spectroscopic selection rule that only applies to centrosymmetric molecules (those with an inversion centre) and atoms. ... The rule originates from a quantum mechanical selection rule that, during an electron transition, parity should be invertedThe Laporte rule is a spectroscopic selection rule that only applies to centrosymmetric molecules (those with an inversion centre) and atoms. ... The rule originates from a quantum mechanical selection rule that, during an electron transition, parity should be inverted