4-Chloro-2-Butanol

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Brock Burnett 3H
Posts: 17
Joined: Fri Sep 25, 2015 3:00 am

4-Chloro-2-Butanol

Postby Brock Burnett 3H » Fri Feb 26, 2016 10:57 pm

Can someone please explain to me why on page 104 of the course reader the Chloro in 4-Chloro-2-Butanol comes before the Butanol? Why does this break the alphabet rule?

Ronald Yang 2F
Posts: 86
Joined: Fri Sep 25, 2015 3:00 am

Re: 4-Chloro-2-Butanol

Postby Ronald Yang 2F » Fri Feb 26, 2016 11:06 pm

"Butanol" refers to the parent chain; chlorine is just a functional group, so you wouldn't use the alphabetical rule. Now, if you were referring to the priority of functional groups, then the OH would have priority over the chlorine, which is why the numbering is how it is.


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