Question

what is the structure of 1,1,2 - trichloroethane? question 12 (10 points) what is the structure of 1 - chloro - 3 - ethyl - 2 - heptanol?

Explanation:

Step1: Analyze the name 1,1,2 - trichloroethane

The root - name "ethane" indicates a 2 - carbon alkane ($C_2H_6$). The prefix "trichloro" means there are three chlorine atoms. The numbers 1,1,2 indicate the positions of the chlorine atoms. Two chlorine atoms are on the first carbon and one is on the second carbon.

Step2: Examine the structures

The first structure has two chlorine atoms on the first carbon and one on the second carbon of an ethane backbone, which is 1,1,2 - trichloroethane. The second structure has a 3 - carbon chain with chlorine atoms in different positions and is not 1,1,2 - trichloroethane. The third structure also has a 3 - carbon chain and is not 1,1,2 - trichloroethane.

Answer:

The first structure