Question

Need help assigning IUPAC names for these alcohols, having trouble naming these... this my first question on here, sorry if it's not asked in the right format. I didn't know how to attach a picture to my original question (if you know how to I would appreciate if you can explain how do that :)) so posted an image as reply.

Answer 1

Hey welcome to OpenStudy. I'll do what I can. So for alcohols you first assign the OH bond with the lowest bond number.

Answer 2

Thank you :)

Answer 3

lowest bond number? Do mean the lowest bonding chain number?

Answer 4

Oh yes that. Sorry I forgot the terms. I did this back in high school.

Answer 5

So just in case you need a guide, here's one of the many help sites on naming alcohols: http://chemwiki.ucdavis.edu/Organic_Chemistry/Alcohols/Nomenclature_of_Alcohols/Naming_Alcohols

Answer 6

Still a bit confused, but from what I'm able to get so far...for c it's 2-methanol, but it seems incorrect

Answer 7

Hmm. I see 4 carbons on the longest chain.

Answer 8

I mean, so it cannot be meth- as the prefix.

Answer 9

For C, the longest chain is 4 carbons, so the name will have propane in it. Then, you label which carbons have substituents, with the OH group getting priority. So, 2-hydroxy-3-methylbutane.

Answer 10

D has 4 carbons also and the OH is on the 2nd carbon. It's pretty much like the answer to C, but without a methyl on it.

Answer 11

Or is C, 3-methyl-2-butanol?

Answer 12

I think but- is the prefix for 4. So it will be 2-butanol. Then there is CH3 on the 3rd carbon so you add 3-methyl. The full name should be 3-methyl-2butanol.

At this point I'm scared I'll make a mistake, so always look out if I do.

Answer 13

Oh yeah I left out a dash. It should be 3-methyl-2-butanol.

Answer 14

I agree wolfe8.

Answer 15

Alright then. So for d) your chain goes this way Can you try naming it?