Formation of cyanines from pyrylium salts and aliphatic acid anhydrides
✍ Scribed by A. I. Pyshchev; L. I. Butenko; É. T. Oganesyan; V. V. Krasnikov
- Publisher
- Springer US
- Year
- 1989
- Tongue
- English
- Weight
- 67 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0009-3122
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📜 SIMILAR VOLUMES
Aliphatic polyimides (P-XBTA) having inherent viscosities of 0.4-1.4 dL/ g were readily synthesized by the high-pressure polycondensation of the salt monomers, composed of aliphatic diamines having various methylene chain lengths ( X Å 4-12) and 3,3,4,4-benzophenonetetracarboxylic acid (BTA), under
## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract During UV.‐irradiation of aliphatic carboxylic acids and esters in aqueous and nonaqueous solutions various alkyl and acyl type radicals derived from parent compounds and solvents have been observed by ESR.‐spectroscopy. The structures of the radicals point to α‐cleavage, β‐dehalogenati