NMR Analysis of C₄H₈O₂ . Can anyone please help me. Much Appreciated!?

Hi,

These take practice to get good at, if you're on the path to chemistry.

Looking at the top picture of your IR, that giant peak around 1700 cm-1 is a carbonyl stretch if you didn't know that already. And it looks like you have a pattern between the 1100-1300 that suggests an ester group.

Looking at your H-NMR I would infer you have three carbons with hydrogens on them. Hopefully you know how splitting patterns arise. The giant peak I assume has an integration of about 3 hydrogens, which would indicate a lone methyl group CH3. Now your peak around 1.25 suggests an ethyl group of CH2, and the peak at about 4.1 is another methyl group CH3. These two peaks are coupling with each other and you could check the J-value to confirm.

So in my mind I'm thinking: Lone methyl group, ester group, ethyl group, and another methyl group.

CH3-C00-CH2-CH3

This is the structure of ethyl acetate. Which fits the data.

You can also use a helpful site called SDBS to confirm structures and obtain spectrums for the compounds.

Hope this helps!

"Spectrometric Identification of Organic Compounds" By

Silverstein, Bassler, Morrill

need better pictures

and now your just spamming asking it a bunch