Question

Butanone is a four carbon per molecule compound. Name the functional group present in it

Answer 1

The functional group present is Ketone.

The 'suffix' used is 'one' which is used for Ketone.

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Answer 2

The functional group present in it is ketone.

Explanation:

Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.

Ketones have functional group -C=O.

IUPAC nomenclature for organic compounds

1. First select the longest possible carbon chain. The longest possible carbon chain should include the carbons of double or triple bonds or functional group.For the number of carbon atom, we add prefix as 'meth' for 1, 'eth' for 2, 'prop' for 3, 'but' for 4, 'pent' for 5, 'hex' for 6, 'sept' for 7, 'oct' for 8, 'nona' for 9 and 'deca' for 10.

2. The naming of alkane is done by adding the suffix -ane, alkene by adding the suffix -ene, alkyne by adding the suffix -yne and ketones by adding the suffix -one.;

3. The numbering is done in such a way that the carbon containing the functional group gets the lowest number.While writing the name, the word root is given first , followed by the position of carbon containing the functional group followed by the suffix.

Butanone will have molecular formula $CH_3CH_2COCH_3$ with

functional group -C=O.

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