Naming compound

[joonkimdds]

I got some questions~

which is correct?
2 bromo 3 chloro butane
or
3 bromo 2 chloro butane?

and when there are bunch of functional groups; alcohol, aldehyde, ketone, ether, ester, amide, what are the order or priority?

and when there are halogen groups and alkyl groups, which one gets the priority?

Thanks~!

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[pez123]

I got some questions~

which is correct?
2 bromo 3 chloro butane
or
3 bromo 2 chloro butane?
The way my professor taught it was if you could name it either way (like in your examples) you would give the first alphabetical one the lowest number. So it would be 2-bromo-3-chlorobutane.

and when there are bunch of functional groups; alcohol, aldehyde, ketone, ether, ester, amide, what are the order or priority?
According to Barron's DAT review it's as follows in decreasing priority:
Carboxylic acids, aldehydes, ketones, alcohols, amines, alkynes, alkenes, halogens and alkyl groups.

and when there are halogen groups and alkyl groups, which one gets the priority?

Thanks~!

not 100% sure anyone?

 

[joonkimdds]

not 100% sure anyone?

I believe that alkene has higher priority over alkyne.

 

[jj8228]

yup alkene has priority over alkyne