Abstract
POLYCYCLIC derivatives of cinnoline are known to form molecular addition compounds with picric acid1. Contrary to the report by Slack and Slack2, I find that benzo [c]cinno-line, in common with its methyl derivatives3, forms a mono-picrate. My compound (found, C, 52.9; H, 2.8; N, 16.8; C18H11N5O7 requires C, 52.9; H, 2.7; N, 17.1 per cent) has the same melting point as that reported by Slack and Slack, who based their formula solely on a nitrogen content of 17.8 per cent.
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References
Braithwaite, R. S. W., and Holt, P F., J. Chem. Soc., 3025 (1959). Corbett, J. F., and Holt, P. F., ibid., 3646 (1960).
Slack, P. Z., and Slack, R., Nature, 160, 437 (1947).
Corbett, J. F., Holt, P. F., and Vickery, M., J. Chem. Soc. (in the press).
Orchin, M., J. Org. Chem., 16, 1165 (1951).
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CORBETT, J. Molecular Addition Compounds of Polycyclic Derivatives of Cinnoline. Nature 197, 177 (1963). https://doi.org/10.1038/197177a0
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DOI: https://doi.org/10.1038/197177a0
