How many alcohols are structural isomers of C5div1OH?

To determine the number of structural isomers of C5H11OH (which is a pentyl alcohol), you can use a systematic approach and consider all the possible ways the carbon and hydrogen atoms can be arranged in a linear or branched chain, while ensuring that the molecule contains the -OH functional group.

Here are the structural isomers of C5H11OH:

Pentanol (n-pentanol): This is the straight-chain isomer with the -OH group at the end of the carbon chain.

Isopentanol (2-methyl-1-butanol): This is an isomer with a branched chain, where the -OH group is attached to the second carbon atom and there is a methyl group (CH3) on the second carbon.

Isopentanol (3-methyl-1-butanol): Another isomer with a branched chain, where the -OH group is attached to the third carbon atom and there is a methyl group (CH3) on the third carbon.

2-Methyl-2-butanol (tert-pentanol): This is an isomer with a branched chain, where the -OH group is attached to the second carbon atom, and there are two methyl groups (CH3) on the second carbon.

So, there are four structural isomers of C5H11OH.