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The Chemical Educator

ISSN: 1430-4171 (electronic version)

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Abstract Volume 19 (2014) pp 327-329

Hammett and Taft Equations are Tools for Identifying the Rate-Determining Step of a Multi-Step Reaction: A One Hour Class-Room Lecture to Graduate Students

Rachuru Sanjeev, Vandanapu Jagannadham*,‡, Adam A Skelton and Rachuru Veda Vrath§

† Department of Pharmacy, University of KwaZulu-Natal, Westville Campus, S. Africa; ‡Department of Chemistry, Osmania University, Hyderabad, 500007, India,; §Department of Chemistry, L N Gupta Evening College, Hyderabad, 500002, India
Received April 10, 2014. Accepted August 21, 2014.

Published: 20 October 2014

Abstract. Use of substituent effects on rates in terms of putative Hammett and Taft equations to identify the exact rate-determining step of a multi-step reaction is described.

Key Words: In the Classroom; organic chemistry; Hammett equation; Taft equation; Rate-determining step

(*) Corresponding author. (E-mail:

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