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Molecular Complexes of Methoxyindoles with 1,3,5-trinitrobenzene and Tetracyanoethylene
M. T. Sung and J. A. Parker
Proceedings of the National Academy of Sciences of the United States of America
Vol. 69, No. 5 (May, 1972), pp. 1196-1200
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/61667
Page Count: 5
You can always find the topics here!Topics: Indoles, Protons, Chemical equilibrium, Molecules, Mathematical constants, Teeth, Absorptivity, Electrons, Molecular spectroscopy, Molecular spectra
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Association constants for 1:1 molecular complexes formed between 1,3,5-trinitrobenzene and various methoxy-substituted indoles have been determined by chemical-shift measurements in their nuclear magnetic resonance spectra. The values of association constants for the molecular complexes are comparable to those obtained by optical spectroscopy. The effect on the association constants and relative chemical shifts of the acceptor protons of the pure complexes of various donors is considered. The association constants and relative chemical shifts of the complexes determined by different protons on the indoles in the presence of an excess of 1,3,5-trinitrobenzene are different. The possible structure of the complexes is discussed. The molecular complexes between tetracyanoethylene and various methoxyindoles have also been studied.
Proceedings of the National Academy of Sciences of the United States of America © 1972 National Academy of Sciences