- Hammett's sigma constant
- 哈墨特(氏)-σ-常数
Medical Chinese dictionary (湘雅医学词典). 2013.
Hammett's sigma constant
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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
Équation de Hammett — L équation de Hammett, en chimie organique, permet de relier les rendements ou les constantes d équilibre d un grand nombre de réactions impliquant des dérivés de l acide benzoïque avec la nature des meta ou para substituants. Cette équation… … Wikipédia en Français
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
Chemical equilibrium — In a chemical reaction, chemical equilibrium is the state in which the concentrations of the reactants and products have not yet changed with time. It occurs only in reversible reactions, and not in irreversible reactions. Usually, this state… … Wikipedia
