Proton magnetic resonance spectra of partially oriented samples of cyclopentadienyl compounds
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 70, 1356-1363
- https://doi.org/10.1039/f29747001356
Abstract
Transition frequencies and intensities of oriented groups of five spin ½ nuclei with P5 permutation-group symmetry are derived. The spectra from (cyclopentadienyl)nickel nitrosyl and bis(cyclopentadienyl)mercury as solutes in a nematic phase have been obtained and analysed. Vibrational averaging has been carried out for π bonded cyclopentadienyl systems, and doing so improves the agreement between observed and calculated ratios of dipolar coupling constants. The spectrum of bis(cyclopentadienyl)mercury is found to be consistent with that of a π bonded species, or with a σ-bonded molecule undergoing rapid internal motion.Keywords
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