Question

write the systematic name of each organic molecule: structure name

Explanation:

Step1: Identify longest carbon - chain

For the first structure, the longest chain has 7 carbon atoms (heptane). There are two methyl groups at positions 2 and 5. So the name is 2,5 - dimethylheptane.

Step2: Analyze second structure

The longest chain in the second structure has 8 carbon atoms (octane). There is a methyl group at position 3 and an ethyl group at position 5. So the name is 5 - ethyl - 3 - methyloctane.

Step3: Examine third structure

The longest chain in the third structure has 6 carbon atoms (hexane). There is a methyl group at position 4. So the name is 4 - methylhexane.

Answer:

2,5 - dimethylheptane
5 - ethyl - 3 - methyloctane
4 - methylhexane