Accession Number:

ADA252335

Title:

Conjugated Ionic Polyacetylenes Spontaneous Polymerization of 2-Ethynyl Pyridine in a Strong Acid

Descriptive Note:

Rept. for 1 May 1991-30 Apr 1992,

Corporate Author:

MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY

Report Date:

1992-05-26

Pagination or Media Count:

33.0

Abstract:

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.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE