Colour Flashcards
1
Q
What is the spin selection rule?
A
Delta S =0
- spin is not allowed to change
2
Q
What is the Laporte selection rule?
A
Delta L = +/- 1
Must be a change in parity for centrosymmetric complexes
3
Q
By the Laporte selection rule what are the allowed symmetry transitions?
A
g <—> u
u <—> g
4
Q
By the Laporte selection rule what are the unallowed symmetry transitions?
A
g <—> g
u <—> u
5
Q
By the Laporte selection rule what are the allowed orbital transitions?
A
p-d allowed
6
Q
By the Laporte selection rule what are the unallowed orbital transitions?
A
d-d forbidden
7
Q
Why are spin forbidden transitions partially allowed?
A
Spin orbit coupling
8
Q
Why are Laporte forbidden transitions partially allowed?
A
relaxed when there is no centre of symmetry allowing p-d mixing
