Molecular Geometry of cis - and trans -Polyacetylene by Nutation NMR Spectroscopy
1983; American Physical Society; Volume: 51; Issue: 13 Linguagem: Inglês
10.1103/physrevlett.51.1191
ISSN1092-0145
AutoresC. S. Yannoni, Thomas C. Clarke,
Tópico(s)NMR spectroscopy and applications
ResumoThe carbon-carbon bond lengths in polyacetylene have been directly measured with use of nutation NMR spectroscopy. 1.36 and 1.44 \AA{} were found for the double and single bonds, respectively, in trans-${(\mathrm{CH})}_{x}$, and 1.37 \AA{} 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-${(\mathrm{CH})}_{x}$ containing a mobile soliton defect was not observed.
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