How many different H environments are there in ethyl propanoate?

[HungTran2009]

How many in CH3CH2COOCH2CH3?

I'm not sure if the answer is 3 or 4...

BTW this is my first chem post!
Excited

[Mao]

5. Each environment is different

[vexx]

5. Each environment is different

isn't this just ethyl propanoate hence there are 4 environments..?

[stonecold]

^yeah, I also think its 4, but then again Mao is pro haha!

[Mao]

5. Each environment is different

isn't this just ethyl propanoate hence there are 4 environments..?

H environments, yes there are 4. I was thinking of C environments...

[azn_dj]

The molecule is not symmetrical.
So even though you have two CH3's, they are not equivalent.
The distance from the oxygens will alter their shifts.
So your answer is four.

[median]

All hydrogens in the CH3 environments are the same aren't they as the shielding is only affected by adjacent atoms so the oxygen wont affect the environment. The answer is 3 im pretty sure. In other words both CH3 groups can be represented as R-CH3. The CH2 groups on the other hand are different as once is adjacent to two carbon atoms while the other is adjacent to a CH3 and an O.
This is right isn't it?

[andy456]

All hydrogens in the CH3 environments are the same aren't they as the shielding is only affected by adjacent atoms so the oxygen wont affect the environment. The answer is 3 im pretty sure. In other words both CH3 groups can be represented as R-CH3. The CH2 groups on the other hand are different as once is adjacent to two carbon atoms while the other is adjacent to a CH3 and an O.
This is right isn't it?

This is what I have been taught. I would say 3

[Mao]

All hydrogens in the CH3 environments are the same aren't they as the shielding is only affected by adjacent atoms so the oxygen wont affect the environment. The answer is 3 im pretty sure. In other words both CH3 groups can be represented as R-CH3. The CH2 groups on the other hand are different as once is adjacent to two carbon atoms while the other is adjacent to a CH3 and an O.
This is right isn't it?

This is what I have been taught. I would say 3

No, there are four.

CH3-CH2-O, as seen by the ethyl group, the H in CH3 is 3 bonds away from O
CH3-CH2-COO, as seen by the carboxylate, the H in CH3 is 4 bonds away from O₂^-
The connectivity is very different.