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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.
“The Economic Gains Have Begun To Expand Beyond The Oil And Gas Fields.” “Even so, there are signs the economic gains have begun to expand beyond the oil and gas fields and that the promise of abundant, low-cost fuels will give a competitive edge to industries from steel, aluminum
Vivanco, Kemp, and van der Voet suggest several strategies: [4] [44] Economy-wide increases in environmental efficiency. The strategy of “consuming more efficiently” aims at reducing the overall magnitude of positive rebound effects by improving the environmental intensity of consumption as a whole (for example, with the help of technology).
The delta model can be illustrated using the strategic triangle (see fig.1). There are three points: system lock-in, best customer solutions and best product. [8] System lock- in enables market dominance and can achieve complementor share, it focuses on the entire system economics and instead of product-centered economics, which makes it very sustainable. [9]
If a firm's business strategy could not cope with the environmental and market contingencies, long-term survival becomes unrealistic. Diverging the strategy into different avenues with the view to exploit opportunities and avoid threats created by market conditions will be a pragmatic approach for a firm.
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