Past exam of the chemistry course of the year 3 of the natural sciences course of the University of Cambridge / 2022 / Paper 2A / Section A / 15 / c / ii / Solution

Now ${\Delta }_o/B=40$ and the ground term is ${}^2{T}_{2g}$. Spin-conserving transitions to the labelled doublet excited terms are possible. Reading the diagram gives approximatelyThe first two upper terms are coincident or unresolved at this diagram's resolution. These doublet transitions should dominate over the spin-forbidden transitions to sextet or quartet levels. Their intensity still depends on vibronic or other relaxation of the Laporte rule. The plotted curves justify only approximate wavenumbers, not several-digit band positions.