Question

IUPAC name and formula of positional isomer of Penatanal​

Answer 1

Pentanal does not have a position isomer, this is because it is an aldehyde and all aldehydes have the structure R-CHO , in such a scenario, it is not possible for the aldehydic group (CHO) to be attached anywhere other than the terminal carbon atoms. Thus, Pentanal cannot exhibit position isomerism but can exhibit chain or structural isomerism.

Pentanal can have only one formula:

C4H9CHO or CH3-CH2-CH2-CH2-CHO.

      H  H H  H O

       |    |   |    |   ||

 H-C-C-C-C-C-H

      |   |   |   |  

     H H H H

=> Thus, no position isomers are possible for Pentanal.

=> Only Structural, Functional or Chain isomers are possible.