Formation of 1,2-Dimethylcyclobutadiene on Photolysis of Dimethylcyclobutenedicarboxylic Anhydride
โ Scribed by Doz. Dr. G. Maier; Dipl.-Chem. U. Mende
- Publisher
- John Wiley and Sons
- Year
- 1969
- Tongue
- English
- Weight
- 207 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0044-8249
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๐ SIMILAR VOLUMES
The primary product of flash vacuum pyrolysis of tetraphenylphthalic anhydride at 86OoC/O.O4 Torr is 1,2,3-triphenylbenzopentalene (74%) and not 1,2,3\_triphenylbiphenylene, as suggested by Fields and Meyerson (1968) for the product of pyrolysis at 69ooC with long contact time (15-20 sec.).
Picosecond laser photolysis and transient absorption spectroscopy were applied to the direct observation of the photochromic reactions, such as ring-closure and ring-opening processes, of 1,2-bis(2,4,5-trimethyl-3-thienyl)maleic anhydride in solutions. Both in the ring-closure and the ring-opening