1H nuclear magnetic resonance spectra of some squaramides
- 1 January 1968
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society B: Physical Organic
- p. 435-436
- https://doi.org/10.1039/j29680000435
Abstract
The paper reports the preparation of some hitherto unknown squaramides (IV)–(IX). N.m.r. spectroscopy has established that there is restricted rotation about the N–C bond in 3-dimethylamino-(IV), 3-diethylamino-(VI), and 3-dibenzylamino-4-ethoxycyclobutenedione (VIII) and free energies of activation for rotation about the N–C bond have been calculated for these compounds.Keywords
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