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-, 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- containing a mobile soliton defect was not observed.
- Received 20 June 1983
DOI:https://doi.org/10.1103/PhysRevLett.51.1191
©1983 American Physical Society