steric Taft's constants

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Hammett equation — ; 1935; 17(1); 125 136 [http://pubs.acs.org/cgi bin/abstract.cgi/chreay/1935/17/i01/f pdf/f cr60056a010.pdf Abstract] ] .The basic idea is that for any two reactions with two aromatic reactants only differing in the type of substituent the change … Wikipedia
Quantitative structure-activity relationship — (QSAR) is the process by which chemical structure is quantitatively correlated with a well defined process, such as biological activity or chemical reactivity.For example, biological activity can be expressed quantitatively as in the… … Wikipedia
Craig plot — The Craig plot (named after David P. Craig) is a plot of two substituent parameters (e.g. Hansch Fujita π constant and sigma constant) used in rational drug design.[1] Two most used forms of a Craig plot are plotting the sigma constants of the… … Wikipedia

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