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Nitrogen and deuterium kinetic isotope effects on the Menshutkin reaction (1996)

Szylhabel-Godala, A. ; Madhavan, S. ; Rudziński, J. ; [et al.]

Chichester : Wiley-Blackwell

Journal of Physical Organic Chemistry 9 (1996), S. 35-40

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ISSN: 0894-3230

Keywords: Chemistry ; Theoretical, Physical and Computational Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Notes: Nitrogen and deuterium kinetic isotope effects were measured in the Menshutkin reaction between methyl iodide and a series of para-substituted N,N-dimethylanilines in ethanol. The nitrogen kinetic isotope effect increases for the more electron-donating substituents [0·9989, 1·0032, and 1·0036 for 4-C(O)Me, H and 4-Me, respectively], in agreement with the Hammond postulate. The secondary deuterium isotope effect, however, exhibits the reverse trend (1·045, 0·989, 0·975 per deuterium, for the respective substituents). This discrepancy is rationalized in terms of solvent molecule participation in the transition state.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

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