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Write the IUPAC names of the following structural formula.

CH– CO – CH2 – CH3

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Number of carbon atoms in the longest chain: 4

Parent alkane: Butane Functional group: -CO- (one) 

Assign the number:

In the longest chain, the numbering of carbon atom starts from the carbon atom nearest to the function group.

If the carbon chain of the compound contains a (-CO-) group, then change the ending of the parent name, i.e., ‘e’ of butane is replaced by ‘one’.

Parent suffix: Butan-2-one 

IUPAC name: Butan-2-one

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