Green Book Chapter 2 Question 16

[William_Lee_Dis_3H]

The answer key says the answer is 3-chloro-3-fluoropropene. Shouldn't the answer be 1-chloro-1-fluoro-2-propene? The two halogens should be on carbon 1 because they get priority over the triple bond. Or am I missing something?

[Sangita_Sub_3H]

When I read the Halides section of the book again, it did not say anything about the halides getting priority over the triple bond. So, that's why I think the answer is the way it is in the textbook. Hope this helps!

[William_Lee_Dis_3H]

On page 50 of the green book, E-3-chloro-4-fluoro-7-methyloct-3-en-5-yne, they number giving priority to the halogens, so I am confused on what the rule is