Which of the following electronic transitions is (are) apparent in the ultraviolet-visible spectrum of acrolein, H₂C=CHCHO?
1) n $\rarr$ $\pi$ *
2) $\pi$ $\rarr$ $\pi$ *
3) $\sigma$ $\rarr$ $\pi$ *

Question

Which of the following electronic transitions is (are) apparent in the ultraviolet-visible spectrum of acrolein, H₂C=CHCHO? 1)n $\rarr$ $\pi$* 2)$\pi$ $\rarr$ $\pi$* 3) $\sigma$$\rarr$ $\pi$*

Quizplus · Accepted Answer

Acrolein has a carbonyl group, which allows for n → π* transitions, and a conjugated π system, which allows for π → π* transitions. The σ → π* transition is not typically observed in the UV-Vis spectrum for acrolein.

Which of the Following Electronic Transitions Is (Are) Apparent in the Ultraviolet-Visible