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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.
Delocalizing the radical ion stabilizes the transition state structure. As a result, the energy of activation decreases, enhancing the rate of the overall reaction. According to the captodative effect, the rate of a reaction is the greatest when both the EDG and EWG are able to delocalize the radical ion in the transition state structure. [7]
An electron-withdrawing group (EWG) is a group or atom that has the ability to draw electron density toward itself and away from other adjacent atoms. [1] This electron density transfer is often achieved by resonance or inductive effects.
Openclipart, also called Open Clip Art Library, is an online media repository of free-content vector clip art.The project hosts over 160,000 free graphics and has billed itself as "the largest community of artists making the best free original clipart for you to use for absolutely any reason".
Examples of computer clip art, from Openclipart. Clip art (also clipart, clip-art) is a type of graphic art.Pieces are pre-made images used to illustrate any medium. Today, clip art is used extensively and comes in many forms, both electronic and printed.
Employee-driven growth (EDG) is a business philosophy that centers an organization’s growth on employee support, engagement, and development. [1] It uses employee recognition, engagement, and rewards as strategies for business growth and customer satisfaction .
The edge effect in scanning electron microscopy is the phenomenon in which the number of secondary and/or backscattered electrons that escape the sample and reach the detector is higher at an edge than at a surface. The interaction volume spreads far below the surface, but secondary electrons can only escape when close to the surface (generally ...
EWG may refer to: Eastern Washington Gateway Railroad, an American railroad; East-West Gateway Council of Governments, a planning organization in Greater St. Louis, United States; Election Working Group, a Bangladeshi civic organization; Electron withdrawing group; Energy Watch Group, an international energy think tank; English Whisky Guild, an ...
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