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Offer an explanation as to why indigo is more colorful than leucoindigo that involves the types...

Offer an explanation as to why indigo is more colorful than leucoindigo that involves the types of conjugation in the two molecules

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Answer #1

The structure of indigo is as shown below.

The structure of leucoindigo is as shown below.

In the case of indigo, two transitions are possible: n and

Whereas in the case of leucoindigo, only transition is possible.

Due to the high wavelength of absorption for n transition, as a result, less energy transition appears in visible region. Hence, indigo is more colorful than leucoindigo.

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