Question

Write the names of the next homologous of CH3CH2OH and HCOOH

Answer 1

The next homologous of CH3CH2OH is propanol (CH3CH3CH2OH)

The next homologous of HCOOH is ethanoic acid (CH3CH2OH)

Answer 2

Answer: propanol

ethaoic acid

Explanation:

Homologous series are the group of compounds with same basic chemical formula but differ in the length of their carbon chain. They differ by a $-CH_2$ group.

The IUPAC nomenclature of organic compounds are given as follows:

Select the longest possible carbon chain.

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.

A suffix 'oic acid' is added at the end of the name if functional group is -COOH and suffix 'ol' is added at the end of the name if functional group is -OH.

Next two homologous member of $CH_3CH_2OH$ will be $CH_3CH_2CH_2OH$ and the iupac name will be propanol.

Next two homologous member of $HCOOH$ will be $CH_3COOH$ and IUPAC name will be ethanoic acid.