CAPE Chemistry Unit 2 · 2012 · Paper 1 · Question Q23

Which of the following types of electronic transitions would NOT produce absorption in the UV/VIS region of the spectrum?

1. (A)\sigma \rightarrow \pi^*
2. (B)\pi \rightarrow \pi^*
3. (C)n \rightarrow \pi^*
4. (D)n \rightarrow \sigma^*