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An electron donating group (EDG) or electron releasing group (ERG, Z in structural formulas) is an atom or functional group that donates some of its electron density into a conjugated π system via resonance (mesomerism) or inductive effects (or induction)—called +M or +I effects, respectively—thus making the π system more nucleophilic.
The Edgeworth box is named after Francis Ysidro Edgeworth, [4] who presented it in his book Mathematical Psychics: An Essay on the Application of Mathematics to the Moral Sciences, 1881. [5] Edgeworth's original two-axis depiction was developed into the now familiar box diagram by Pareto in his 1906 Manual of Political Economy and was ...
An electric effect influences the structure, reactivity, or properties of a molecule but is neither a traditional bond nor a steric effect. [1] In organic chemistry, the term stereoelectronic effect is also used to emphasize the relation between the electronic structure and the geometry (stereochemistry) of a molecule.
Economics handbooks that form a series include, but are not limited to, the following: Cambridge Economic Handbooks – associated with Cambridge University Press in the U.K. It began in 1922 with volumes titled Supply and Demand [3] and Money. [4] Volumes in the series carry an often-cited introduction of J. M. Keynes, its first editor. [5]
It wasn’t long ago that China was by far the largest, and most profitable market, for General Motors. While the company was hemorrhaging money in North America and Europe and hurtling towards ...
An example spangram with corresponding theme words: PEAR, FRUIT, BANANA, APPLE, etc. Need a hint? Find non-theme words to get hints. For every 3 non-theme words you find, you earn a hint.
For example, the substituent may determine the mechanism to be an SN1 type reaction over a SN2 type reaction, in which case the resulting Hammett plot will indicate a rate acceleration due to an EDG, thus elucidating the mechanism of the reaction. Another deviation from the regular Hammett equation is explained by the charge of nucleophile.
From January 2008 to October 2010, if you bought shares in companies when Mary K. Bush joined the board, and sold them when she left, you would have a -29.9 percent return on your investment, compared to a -21.9 percent return from the S&P 500.
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