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Digitale Medien

Thallation of fluorenes: A kinetic and mechanistic study (1978)

Narasimhan, S. ; Ramani, P. V. ; Venkatasubramanian, N.

New York, NY : Wiley-Blackwell

International Journal of Chemical Kinetics 10 (1978), S. 581-589

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Details

ISSN: 0538-8066

Schlagwort(e): Chemistry ; Physical Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The kinetics of thallation of fluorene with thallium triacetate (TTA) in HOAc-H2SO4 solutions led to the rate expression \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm rate = [TTA]}^{\rm 2} [{\rm fluorene}] $$\end{document}The rate of thallation is found to increase with increasing acid concentration, and a sixth-order dependence on [H2SO4] is observed. Decrease in solvent polarity increases the rate of thallation. The effect of substituents is in accord with the electrophilic substitution at an aromatic system. Thallation occurs at 4-position. A mechanism similar to aromatic bromination is proposed for the thallation of fluorene.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/kin.550100605

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