Preparation and some reactions of N,N-diacetylamines
β Scribed by H. J. Meyer; C. Nolde; I. Thomsen; S. -O. Lawesson
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2010
- Weight
- 251 KB
- Volume
- 87
- Category
- Article
- ISSN
- 0037-9646
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π SIMILAR VOLUMES
To account for the formation of the pyrrole derivatives, we assume that, by analogy to the Polonovski reaction [3], the N-oxide is acetylated by the acetic anhydride at the oxygen. The intermediate (4), which cannot be isolated, loses a molecule of acetic acid with formation of a pyrroleninium catio
The mean As-0 distance is 1.70 8, in the As04 tetrahedron and 1.82 A in the As06 octahedron; the mean As-0-As bond angle at the bridging oxygen atom is 127", and the angle between the octahedral plane and octahedral diagonal is 87 'I. The length of each hydrogen bond (5 per unit cell) is between 2.5