Kinetics of Photochemical Reactions of Thionine with Thiourea
✍ Scribed by Fahim Uddin
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 283 KB
- Volume
- 2000
- Category
- Article
- ISSN
- 1434-193X
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## Abstract The kinetic equations of a photochemical system are discussed in which the transitions from the ground to the first excited state are produced by a sinusoidally modulated photon source. The system includes irreversible reactions starting from the first excited singlet state __S__~1~ and
While the acid-catalyzed reaction of a$-unsaturated carbonyl compounds with thiourea has been known for long'), the similar reaction of cyclic thioureas has hardly been investigated. In the only case 2-imidazolidinethione was treated with a$-unsaturated carbonyl compounds in the presence of hydrochl
## Abstract Photochemical reactions of caffeine with several aliphatic aldehydes are performed. In the reactions with ethanal, propanal and butanal stable 8‐acyl‐8,9‐dihydrocaffeines 2 and 3 together with unreduced 8‐acylcaffeines 4 and 8‐(α‐hydroxyalkyl)caffeines 6 are produced. Under similar cond