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Write structure formulae and names of four possible aldol condensation products form propanal and butanal. In each case. Indicate which aldehyde acts as nucleophile and which as electrophile.

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Both propanal and butanal have `prop`-hydrogen atoms present. These can undergo self aldol condensation as well as cross aldol condensation to give four compounds as follows :
(i) Condensation involving propanal. It is a case of self aldol condensation.

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Knowledge Check

  • The cross aldol product formed when propanal acts as the electrophile and butanal as nucleophile is

    A
    3-hydroxy-2-methylpentanal
    B
    3-hydroxy-2-methylhexanal
    C
    2-ethyl-3-hydroxypentanal
    D
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  • Aldehyde and ketone molecules having alpha - hydrogen atoms undergo aldol condensation reaction. Aldol condensation reaction preceeds in acidic and basic conditions. In basic medium, aldol condensation product will be formed involving enolate ion formation. Here the enolate ion acts as nucleophile. Other carbonyl group containing compounds also perform similar type of reactions. Final product X is

    A
    B
    `CH_(3)CHO` and `CH_(3)COOH`
    C
    D

  • Aldehyde and ketone molecules having alpha - hydrogen atoms undergo aldol condensation reaction. Aldol condensation reaction preceeds in acidic and basic conditions. In basic medium, aldol condensation product will be formed involving enolate ion formation. Here the enolate ion acts as nucleophile. Other carbonyl group containing compounds also perform similar type of reactions. overset(CH_(3)-CHO) underset("Piperidine, Pyridine")toX Final product X is

    A
    `overset(HOOC-CH-COOH) overset(|)underset(CH_(3))underset(|)(HC)-OH`
    B
    `overset (HOOC-C-COOH) overset(||) (HC-CH_(3))`
    C
    D
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