Answer to Question #136263 in Physical Chemistry for Nicole

Question

Write a note on the Hammett Plots as an example of linear free energy relationships arising in
organic reactions; ensure the following are included in your discussion:
a) Derive the Hammett equation and define all the terms.
b) What is the significance of (ρ)-(rho), the reaction constant, sigma (σ), the substituent
constant in the Hammett equation.
c) Comment on meaning of positive and negative values of σ and ρ in the Hammett
equation.
d) Explain the conditions in which the σ+
, σ –
scale of values are used.
e) What is the application of the Hammett equation?
f) Hammett plots are not always linear; explain the meaning of their deviation from
linearity.

Answer 1

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