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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: bubblegumpi on July 17, 2017, 04:26:17 PM

Title: Another name this molecule question (easy one)
Post by: bubblegumpi on July 17, 2017, 04:26:17 PM
So this molecule looks like it should exist.

Its a pentane alcohol with the OH at 2' so is it an "isoalcohol"?

Would it be 6'-isopental-4-ol-benzene? (The 4 is from the position of the OH counting from the ring, 6' is on the benzene) Or is it a phenol because it has an alcohol attached?
Title: Re: Another name this molecule question (easy one)
Post by: sjb on July 17, 2017, 05:50:37 PM
Use of things like isoalcohol in names is difficult to fully explain - there are also IUPAC ideas. I don't think you have a benzene ring from your drawing. You have some good thoughts though. What are your side groups.
Title: Re: Another name this molecule question (easy one)
Post by: bubblegumpi on July 18, 2017, 11:05:35 AM
Quote from: sjb on July 17, 2017, 05:50:37 PM
Use of things like isoalcohol in names is difficult to fully explain - there are also IUPAC ideas. I don't think you have a benzene ring from your drawing. You have some good thoughts though. What are your side groups.

Its actually a screen shot from a video I saw, and since I have to know everything I tried to find that molecule.
Parts:
Benzene
Alkane 5C (iso-2-pentanol?)
OH
Title: Re: Another name this molecule question (easy one)
Post by: Babcock_Hall on July 18, 2017, 01:34:47 PM
As a general rule (and to the best of my knowledge) the group with the larger number of carbon atoms is the parent, and the smaller number of carbons is the substituent.
Title: Re: Another name this molecule question (easy one)
Post by: sjb on July 18, 2017, 01:55:19 PM
Compare and contrast the skeletal formulae of benzene and the ring system you have (see e.g. https://en.wikipedia.org/w/index.php?title=Benzene&oldid=791125200 )
Title: Re: Another name this molecule question (easy one)
Post by: bubblegumpi on July 20, 2017, 07:01:30 PM
Quote from: sjb on July 18, 2017, 01:55:19 PM
Compare and contrast the skeletal formulae of benzene and the ring system you have (see e.g. https://en.wikipedia.org/w/index.php?title=Benzene&oldid=791125200 )

I know it doesn't have the = in place of - but this is just a crude drawing from a video by someone who is not a chemist. So I assumed they would have drawn the = if they were. If this was a real molecule which it might be it would have the = bonds.
Title: Re: Another name this molecule question (easy one)
Post by: sjb on July 21, 2017, 01:33:08 AM
Quote from: bubblegumpi on July 20, 2017, 07:01:30 PM
I know it doesn't have the = in place of - but this is just a crude drawing from a video by someone who is not a chemist. So I assumed they would have drawn the = if they were. If this was a real molecule which it might be it would have the = bonds.

I understand what you mean but as both probably exist but to use a crude analogy it is like asking what car Lewis Hamilton is driving in this year's Formula 1 world championship, but the car is a bicycle instead. I'm not 100% sure of IUPAC preferences these days but I would call the ring a substituent of the alkyl chain, regardless.