The Wittig and aldol condensation reactions are both used in organic synthesis t

Question

The Wittig and aldol condensation reactions are both used in organic synthesis to form carbon-carbon bonds. In both reactions, a double bond is formed between two reactants. Select the difference between Wittig reactions and aldol condensations. Aldehydes are not used as reactants in aldol condensations. Wittig reactions can be used to synthesize unsaturated hydrocarbons with no other functional groups, while aldol condensations cannot. Wittig reaction mechanisms do not contain resonance structures. Aldehydes are not used as reactants in Wittig reactions.

Explanation / Answer

The Wittig reaction is nicely complementary to the aldol condensation, in which carbonyl compounds are attacked not by a phosphorus ylide but by an enolate. Aldol condensations always result in “enones”, alkenes with a carbonyl attached. Wittig reactions are more general in that the product carbonyl does not need to have an attached carbonyl.

Here enolate ion is also part of Aldehyde so it is reactant .Among options "Aldehydes are not used as reactants in wittig reactions".

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