Which of the following electronic transitions is common in the UV spectrum of 1,3-butadiene?

Question

Quizplus · Accepted Answer

The p®p* transition is common in the UV spectrum of 1,3-butadiene because it is a conjugated diene. The conjugated double bonds allow for the delocalization of electrons, which results in a lower energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO). This lower energy gap corresponds to a longer wavelength of light, which is in the UV region of the spectrum.

Which of the Following Electronic Transitions Is Common in the UV