Opted # 85

[Gainesvillian]

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Opted Organic #85:

Which of the following will undergo a free radical bromination most rapidly?

H
A. H3C-C-CH3
CH3

CH3
B. H3C-C-CH3
CH3

C. CH4

D. CH3CH3

E. Triangle? Oxirane? Cyclic thingy

I would think A not C. Don't tertiary alkanes react most rapidly with free-radical bromination? Is this one a typo?

 

[blysssful]

Ugh. This is frustrating. I'm hesitant to think that there would be a typo because I feel like they would have fixed it after how many hundreds of people take this specific exam... but I can't think of a single reason why the answer would be C. Free radical bromination IS selective, and wants the most stable intermediate...so I dunno. Sorry dude. 😕

 

[zyg0te]

The opted test definitely has some typos. I saw in another thread everyone agrees physics#35 is wrong.

I think this answer is wrong as well. Primary is the least rapid because it cannot stabilize the radical, benzylic is the most stable since it can. Of the choices provided, I chose A as well.

 

[achirum]

If thats what it looks like or appears to look like, then A should be correct.