[xtheunknown0]

Hello,

I'm trying to do a question asking me for the expected chemical shifts of all proton environments for ethyl ethanoate. I've looked at a table of known chemical shift values but I can't map the one for CH2CH3. How do I do this part of the question?

TIA,
xtheunknown0

[kryptoniitti]

It depends what kind of tables you are using because despite Shoolery's rule etc., the publisher might have different styles/sequences to add up the chemical shifts. E.g. this is how I would do it with my tables:

Chemical shift for CH3CH2 in ethyl ethanoate

table 1 delta value for methyl group protons
CH3-Y (search the table for the value  Y = -R [R = alkane chain])

table 2 effect of beta-substituents
CH3-C-Y (search the table for the value  Y = -OCOR)

So I need to incorporate some correction because of the ester. Check your tables and see how they work.

Also, look for the multiplicy of the signal in the spectra.