Jump to content
Sign in to follow this  

Need urgent help on general molecular formulae for organic compounds

Recommended Posts

I'm currently working on an organic chemistry assignment where we are told to explore all 12 functional groups of organic compounds. I'm stuck as to how to give the general molecular formula for these 12 (alkane, alkene, alkyne, alcohol, ether etc), so could anybody help me out? Any help is appreciated. This is what I have so far and I'm sure there are some mistakes. n = subscript for the number of atoms.

Alkane - C(n)H(2n+2)

Alkene - C(n)H(2n)

Alkyne - C(n)H(2n-2)

Alcohol - C(n)H(2n-2)OH

Ether - C(n)H(2n+2)O

Aldehyde - C(n)H(2n+1)COH

Ketone - C(n)H(2n)O <---- should the O be somewhere in the middle of the formula since it is a ketone?

Carboxylic acid - C(n)H(2n-1)COOH

Ester - C(n)H(2n+2)COO

Amine (primary) - C(n)H(2n+1)NH2

Amide - C(n)H(2n+2)CONH

Alkyl Halide - C(n)H(2n+1)X, X = any halogen (F, Cl, Br, I)


Share this post

Link to post
Share on other sites

Ketone C(3+n)O(n)H(6+2n)

By the way, I'm sure this is really find to, just google general formulas for organic homologous series :)

Edited by omri

Share this post

Link to post
Share on other sites

Alkynes are not in the curriculum. They weren't for 2011 at least...

Neither were ethers I think O.o

You have all of them as far as I can tell since you don't do cyclic molecules either.

An ester isn't always going to end with OO. The general idea is RCOOCR, you can have more stuff on either side of the ester group.

That's all I found to say stuff about XD

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.