Proton NMR Q

[299678]

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The isopropyl group have a quadruplet and singlet with 6H.
How come methyl group doesn't have a double let? is this something related with symmetry?

 

[299678]

?

 

[flybry2000]

I could be wrong, but I thought you would have a doublet that is six units high, and a seventuplet that is i unit high...any takers?

Flybry2000

 

[RCT PC CRN]

I could be wrong, but I thought you would have a doublet that is six units high, and a seventuplet that is i unit high...any takers?

Flybry2000

I would agree with Flybry2000. Septet around 1-2 ppm (CH3) and doublet around 2 ppm (-CH) - assuming iPr connected to R group with no H on C which is connected to iPr.