Crystallographic study and molecular orbital calculations of 1,2,5-thiadiazole 1,1-dioxide derivatives
β Scribed by E. E. Castellano; O. E. Piro; J. A. Caram; M. V. Mirifico; S. L. Aimone; E. J. Vasini; M. D. Glossman
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 528 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0894-3230
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β¦ Synopsis
Single-crystal x-ray diffraction studies are reported for 3,4-dimethyl (I), 3-methyl-4-phenyl (II) and 3,4-diphenyl (III) derivatives of 1,2,5-thiadiazole 1,1-dioxide. Ab initio MO calculations on the electronic structure, conformation and reactivity of I, II and III are also reported and compared with the x-ray results. The structural data are related to previous kinetic and electrochemical experimental results on these compounds.
π SIMILAR VOLUMES
Aminoimino tautomerism 4-Amino-3-oxo-1,2,5-thiadiazole 1,l-dioxides 2 have been proposed as interesting "urea equivalent" fragments in the development of new histamine Hz-receptor antagonists". These compounds were previously prepared by a tedious multi-step procedure involving ring contraction of 4
We have performed a product and kinetic study of the hydrolysis of 3,4-diphenyl-1,2,5-thiadiazole-1,l-dioxide in aqueous solution. Benzil and sulfamide are the only products of hydrolysis and are formed in equimolar yields. The kinetic results indicate that a first order law is followed up to 90% c