Unstable intermediates. Part C. Urea and formamide: the radicals ĊONH2and H2NCONH
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 2400-2402
- https://doi.org/10.1039/j19710002400
Abstract
At 300 K, both urea and formamide, on exposure to 60Co γ-rays, gave e.s.r. spectra characteristic of CONH2 radicals. The 13C hyperfine coupling confirmed that this is a σ radical, having a high spin-density on carbon. At 77 K urea gave a spectrum characteristic of the π radical H2NCONH, having a high spin-density on nitrogen. Possible mechanisms for radiation damage are outlined.Keywords
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