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1) The fluorenone reduction was monitored by TLC using short wave UV-light to visualize the components on the TLC plate

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1) The fluorenone reduction was monitored by TLC using short wave UV-light to visualize the components on the TLC plate. Under UV-exposure, the TLC plate glows green because the silica gel is stained with a fluorescent indicator.

2) What is special about fluorenone that allows it to essentially "glow" purple under UV-light?

3) Is the benzil reduction visualized in the same way? Why or why not?

4) Arrange the following species in order of polarity (most to least) as would be observed on a silica gel TLC plate (Hydrobenzoin, Benzil, Benzoin)