In the complex ion [Cr(NH3)6]3+, one of the possible electronic transitions is from the t2g to the egĀ orbital.
Determine whether this to transition is allowed or forbidden and provide a reason for your answer.
1
Allowed, because the transition satisfies both the spin and Laporte selection rules.
2
Forbidden, due to a violation of the spin selection rule.
3
Forbidden, due to a violation of the Laporte selection rule.
4
Allowed, because it follows the selection rule for centrosymmetric complexes.