буду весьма благодарна за две статьи:
1. S. J. BALL, E. W. WARREN & E. W. PARNELL,
Anticoccidial Activity of Nicotinamide Antagonists,
Nature, 208, page 397- (23 October 1965);
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http://dx.doi.org/10.1038/208397a0 Is the transition state indeed intermediate between reactants and products.
The Michael addition reaction as a case study;
Accounts of Chemical Research,
vol. 26, 1993, issue 2, pp 69 - 74
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http://dx.doi.org/10.1021/ar00026a006