Synthese d'imines cycliques non-stabilisees par reactions gaz-solide sous vide et thermolyse-eclair (1,2)
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2012, Science of the Total EnvironmentCitation Excerpt :According to the results of Abia et al. (1998) on the oxidation of aliphatic amines by hypochlorite, it can be assumed that in the key step a positive charge is developed on the nitrogen atom of the pyrrolidine ring by an attack of the lone pair of nitrogen on the HOCl molecule. Subsequent dehydrohalogenation (Guillemin et al., 1988) of the intermediate (I) cation 10 (Fig. 4) gives the iminium cations I11–I13. BP2 and BP5 have already been proposed as oxidative derivatives of imine salt I11 by Hubert-Brierre et al. (1975).
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2011, TetrahedronCitation Excerpt :For example, bands at 1764/1760, 1753, 1541/1536/1530, 1492, 1300, and 1173/1168 cm−1, in argon, with counterparts at 1763/1758, 1751, 1537, 1490/1488, 1298, and 1171/1163 cm−1, in xenon, respectively, are intense characteristic bands of MCPOC.81 On the other hand, for both the azirine and ketenimine species no experimental data for the matrix-isolated compounds were reported hitherto, so that their identification and band assignments were based on the comparison with theoretically predicted spectra obtained at the DFT(B3LYP)/6-311++G(d,p) level of theory and on data for other molecules of the same families.47,50,51,82–91 Moreover, these two compounds have conformationally flexible molecules and, according to the structural calculations performed on these species, several low energy conformers exist in both cases.
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