Molecular Geometry of cis- and trans-Polyacetylene by Nutation NMR Spectroscopy
Abstract
The carbon-carbon bond lengths in polyacetylene have been directly measured with use of nutation NMR spectroscopy. 1.36 and 1.44 Å were found for the double and single bonds, respectively, in trans-(CH)x, and 1.37 Å was found for the double bond in the cis isomer. Over the temperature range 4.2-300 K, the dynamical single-double bond interchange predicted for chains in trans-(CH)x containing a mobile soliton defect was not observed.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 1983
- DOI:
- Bibcode:
- 1983PhRvL..51.1191Y
- Keywords:
-
- 72.15.Nj;
- 61.16.Hn;
- 61.65.+d;
- 76.60.-k;
- Collective modes;
- Nuclear magnetic resonance and relaxation