✦ LIBER ✦
Contrasting photochemical behavior between meta-substituted and para-substituted aromatic polycarbonyl compounds
✍ Scribed by Yoshikatsu Ito; Nobuhiro Kawatsuki; Teruo Matsuura
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- French
- Weight
- 256 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
The meta-substituted polyketones l,b -f_, including the parent ketone 12, afforded approximately similar values for the quantum yield of benzocyclobutenol formation (o,,), the triplet lifetime (T), ET, and ~~~~~ respectively. In contrast, mCB, T, ET, and ~~~~ of the para-substituted polyketones 2 -2 depended on their molecular structures. Despite extensive photochemical study concerning monocarbonyl compounds,* that of conjugated polycarbonyl compounds is scarce.3 We have studied the photocyclization of 2,4,6-tri-