The linear relationship fit well in the Hammett Equation.
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This equation was modeled after the Hammett equation.
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A still very interesting application is the Hammett equation, Taft equation and pKa prediction methods.
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In other words, for such reactions, application of the standard Hammett Equation " does not " produce a linear plot.
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The Hammett equation predicts the equilibrium constant or reaction rate of a reaction from a " substituent constant " and a " reaction type constant ".
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Since the equation has the same pattern as the Hammett equation but captures the change of the solvent system, it is considered as an extension of the Hammett equation.
7.
Since the equation has the same pattern as the Hammett equation but captures the change of the solvent system, it is considered as an extension of the Hammett equation.
8.
To correlate these deviations from linearity, Yasuhide Yukawa and Yuho Tsuno proposed a modification to the original Hammett Equation which accounts exclusively for enhanced resonance effects due to the high electron demand during such reactions.
9.
The Yukawa-Tsuno Equation allows for treatment of " both " para-and meta-substituents, and it also better correlates data from reactions with high electron demand than the original Hammett Equation.
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In the fall of 2009, students in the graduate course in physical organic chemistry ( 40 students ) added content to the following sites : host-guest chemistry, Hammett equation ( modifications ), talk ) 15 : 24, 12 October 2009 ( UTC)