# Question #8ba4e

Jun 30, 2016

Secondary.

#### Explanation:

Isopropyl group is $C {H}_{3} - R C H - C {H}_{3}$ where R is the substituent group.

The carbon atom to which the substituent is bonded is connected to 2 other carbon atoms, therefore it is bonded at a "SECONDARY" carbon.

The definition is based on the number of carbon atoms that are bonded to the carbon to which the substituent is bonded.

If the number is 1, then the substituent is bonded to a "Primary" carbon. If it is 2, then "Secondary", and if it is 3 then "Tertiary".