In Paulings eqn:
$$ \%~\ce{ionic~character} = \left[ 1−e^{−(Δχ/2)^2}\right] \times 100$$
What is $e$?
I for the love of me can't find it anywhere
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$\begingroup$ Related to the answer: chemistry.stackexchange.com/questions/27535/… $\endgroup$– user15489Jun 21, 2015 at 5:54
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1 Answer
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'e' is a natural exponential function, so not an actual measurement.
The equation is correctly written as:
% Ionic character $= (1 − e^{−(\frac{Δχ}{2})^2})×100$
where the $−(\frac{Δχ}{2})^2$ term is raised as a power of the natural exponent 'e'.
Source: The University of the West Indies page Lecture 3. Polarizability, you'll need to scroll down the page a bit to the section labelled 'Bond character based on electronegativity differences'.
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$\begingroup$ Thank you, that is what I thought. just needed some confirmation. That lecture is exactly what I used $\endgroup$– DanieJun 21, 2015 at 12:31