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![[Post New]](/templates/default/images/icon_minipost_new.gif) 13 Apr 2008 06:12:50 IST
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I Would like to know.............
1. the conditions for resonance in relation with the various conjugations( pi-sigma-+ve, pi-sigma-(-ve) )
2.Under What conditions does resonance NOT take place Inspite of the presence of these conjugations?
Thank U.
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13 Apr 2008 20:48:57 IST
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For resonance we must have a lone pair of electrons pr a negative charge or a pi bond followed by a sigma then again a pi. We may or may not have an extended conjugated system
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13 Apr 2008 20:52:04 IST
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Five major conditions for resonance to take place-
pi in conjugation with sigma bond,
lone pair in conjugation with pi bond,
+ charge in conjugation with pi bond,
- charge in conjugation with pi bond
free radical in conjugation with pi bond,
Hope it helped,
CHEERS!!
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