Consider compound A, a highly conjugated molecule. Below find the UV-VIS spectrum of the compound before and after bleaching. Can you explain with a picture why bleach changed the UV-VIS spectrum of compound A? How does bleach (hypochlorite ion) act as a whitening agent?
Before bleaching UV-VIS
After bleaching
UV
VIS
200
400 Amul
700
200
400
Wavelength (nm)
Wavelength (nm)