Organic Chemistry> Which name is correct and why- 2-Bromo-5-...

Which name is correct and why-

2-Bromo-5-hydroxybenzonitrile

6-Bromo-3-hydroxybenzonitrile

Satviki Pathak , 10 Years ago

Grade 11

3 Answers

Aarti Gupta

Last Activity: 10 Years ago

Dear student although you haven’t post the organic compound whose IUPAC name you are asking but i think 2-Bromo-5-hydroxybenzonitrile must be its correct name.This is because -CN group must get priority over the -OH and -Br as it is principle functional group and as per IUPAC bromo comes first in naming than hydroxy.

Satviki Pathak

Last Activity: 10 Years ago

yes but why does bromo come first over hydroxy? I mean Br is a substituent and OH is a functional grp right? so shouldnt OH got priority over Br?

Aarti Gupta

Last Activity: 10 Years ago

Dear student functional group is -CN here, so we are naming the compound as nitrile,but both the -OH and -Br behave as the substituent and in naming hydroxy and bromo,bromo wil comes first.So it is named first over the hydroxy.Hope your doubt will get cleared.All the very best.