• Support PF! Buy your school textbooks, materials and every day products Here!

Molecule name

  • Chemistry
  • Thread starter Lizzy
  • Start date
  • #1
6
0

Homework Statement


Is the name of this particular molecule 2-ethylpentanone or 2-ethylpentanal?


Homework Equations





The Attempt at a Solution

 

Attachments

Answers and Replies

  • #2
Borek
Mentor
28,327
2,714
Why the problem? What kind of functional group do you see?
 
  • #3
6
0
I see a Aldehyde group which would be an -al ending.....so im going to conclude 2-ethylpentanal is the right answer here? Do you always count the longest chain possible starting at the Aldehyde group?
 
  • #4
Borek
Mentor
28,327
2,714
Yes, it is an aldehyde, so 2-ethylpentanal is the right answer.

Do you always count the longest chain possible starting at the Aldehyde group?
No. You have to choose the chain with the highest precedence group. When there is aldehyde only, it will have the highest precedence obviously.
 
  • #5
6
0
Thank you very much borek:) , but how do you determine which group (if there were multiple) takes higher precedence?
 
  • #6
Borek
Mentor
28,327
2,714
There is a list to remember. I don't deal with organic chemistry so I long forgot it, but it can't be difficult to google.
 

Related Threads for: Molecule name

  • Last Post
Replies
3
Views
3K
Replies
4
Views
4K
Replies
5
Views
2K
Replies
1
Views
3K
  • Last Post
Replies
4
Views
704
  • Last Post
2
Replies
29
Views
2K
Top