Conjugated Ionic Polyacetylenes Spontaneous Polymerization of 2-Ethynyl Pyridine in a Strong Acid
Rept. for 1 May 1991-30 Apr 1992,
MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY
Pagination or Media Count:
The spontaneous polymerization of the acetylenic bond in 2-ethynylpyridine in concentrated hydrochloric acid resulted in a substituted, extensively conjugated ionic polyacetylene bearing protonated pyridinim side groups. The backbone conjugation for the polymer was much greater than those obtained by a spontaneous processes via a Menschutkin reaction and by complexation with bromine. Base catalyzed deprotonation of the polymer resulted in a substantial decrease in backbone conjugation. The physical and spectral data prior to and after deprotonation correlate well with theoretical calculation and provides insight regarding its structural and conformational characteristics.
- Physical Chemistry
- Polymer Chemistry
- Atomic and Molecular Physics and Spectroscopy