Photoreduction of fluorenone by amines. Medium effects.

✍ Scribed by Saul G. Cohen; Joseph B. Guttenplan

• Publisher: Elsevier Science
• Year: 1968
• Tongue: French
• Weight: 173 KB
• Volume: 9
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)75382-2

✦ Synopsis

We have reported that aliphatic amines are efficient photoreducing agents for aromatic ketones (l-4) which have low-lying n,rrY triplet states. ( ) We have also found that p-aminobenzophenone, PAB, which is not photoreduced by 2-propanol because of a low-lying chemically unreactive 'rr,rrW or charge-transfer (CT) triplet in that solvent (6,7), is photoreduced readily by triethylamine in cyclohexane (8a,b,c), rp -0.6. We wish to report on a study of fluorenone, which does not have CT absorp-