Rules for Naming Organic Molecules

Question 1

Step 1

Answer 1

Find the longest chain with the functional group on it

Question 2

Step 2

Answer 2

Number the chain from the end that gives the functional group the smallest number

Question 3

Step 3

Answer 3

If the functional group is not on the end carbon chain then you have to add the number within the name (eg. but-2-ene)

Question 4

Step 4

Answer 4

Don’t forget to add the side chains on the carbon number it says (eg. 2, methyl - means a CH₃ comes off carbon 2 or 2, 3 dimethyl - means CH₃ comes off carbon 2 and 3)

Question 5

Step 5

Answer 5

If any of these, Chloro (Cl), Fluoro (Fl), Bromo (Br), Iodo (I), Amino (NH₂), Hydroxy (OH), are attached to say an alkene or a carboxylic acid, write something like this: CH₃CH(OH)CH₂COOH or CH₃CH₂CH(NH₂)CHCH₂