Chemical Forums
Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: google1 on October 17, 2010, 03:33:52 PM
-
I am looking for some clarification on isomers of C4H8?
I am studying for an exam and was just browsing quiz questions on the internet and found a question on sparknotes asking to draw as many isomers of C4H8 as possible. In the solution section they came up with 5 possible isomers. I think I came up with an isomer that was not included in the solution section. I don't know the name so here is a description: 1 primary carbon-double bonded to-tertiary carbon.
-----Also, how do you attach image files from ACD chem sketch?
-
From your description I'm assuming it looks something like this:
(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fwww.webqc.org%2FIa66.jpg&hash=58eb5af34068bee41535aa3516a867e5ddb9eaa1)
If so that would be 2-methylpropene, more commonly know as Isobutylene
-
Yah, that is the molecule I was (trying) to describe.
2-methylpropene is not included as a isomer of the molecular formula C4H8 on sparknotes. Therefore, 'sparknotes' must be wrong right?
-
Yes it would be.
When considering the alkene isomers of C4H8 there are only 4 isomers, if one expands that to include cyclic alkanes there are 2 more (cyclobutane and methylcyclopropane).
I'm not exactly sure what 'sparknotes' lists though.
-
This is the webpage- http://www.sparknotes.com/chemistry/organic2/alkanes/problems.html#explanation1
Click on solutions for problem 1 and the listed isomers will appear.
So I guess it probably isn't worth all this trouble but when I am studying for an exam it is a little frusterating.
-
Yeah, it looks like that was the just the 1 out of the 6 possibilities they just left out for some reason