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In the which of the following compounds mesomerie effect is possible?Vinyl chloride , b) Allyl chloride and c) 3- Butenal |
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Answer» Solution :(a) Vinyl chloride `CH_(2) = CH- underset(..)overset(..)(Cl):` (b) Allyl chloride `CH_(2) = CH- CH_(2) - underset(..)overset(..)(Cl):` (C ) 3-Butenal `CH_(2) = CH- CH_(2) - underset(underset(H)(|))(C )= O` In vinyl chloride LONE pair and `pi` bond are in conjugation. Hence + M EFFECT is possible in iit. In allyl chloride, lone pair is not inconjugation with `pi` bond and in 3-butenal also conjugation is ABSENT. Thus in allyl chloride and 3-butenal, mesomeric effect is abscent. |
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