Synthesis of Aromatic Polyisophthalamides by in Situ Silylation of Aromatic Diamines†
✍ Scribed by Lozano, Angel E.; de Abajo, Javier; de la Campa, José G.
- Book ID
- 111907494
- Publisher
- American Chemical Society
- Year
- 1997
- Tongue
- English
- Weight
- 71 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0024-9297
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📜 SIMILAR VOLUMES
## Abstract New polymer‐forming monomers, 3‐benzylidene‐5‐chloroformylphthalide and 3‐benzylidene‐6‐chloroformylphthalide, were synthesized by the Perkin reaction of trimellitic anhydride with phenylacetic acid, followed by chlorination. The polycondensation of these monomers with aromatic diamines
The reasons for the reactivity increase toward acyl chlorides caused in aromatic amines by silylation are studied by quantum semiempirical and ub initio methods. Silylated amino groups adopt an sp2 planar geometry, in contrast to that observed in the unsilylated series, where a partially pyramidal s