what is the difference between resonance effect and mesomeric effect??

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Discussion Response Post to: what is the difference between resonance effect and mesomeric effect??

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winx (1236)

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though both resonance & mesomerism represent da same phenomenon,
dey differ lyk dis ------->

resonance involves all types of electron displacements while.........

mesomerism z noticable only in those cases wer a multiple bond is in conjugation with a multiple bond or lone pair of electron

Example :

Both (i) and (ii) are the examples of mesomerism and resonance effect. Let us consider the following example . Such an electron displacement is the example of resonance only (not the mesomerism )

SOURCE-----> http://www.transtutors.com/chemistry-homework-help/general-organic-chemistry/resonance-effect.aspx

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