Year 12s: what will be the first way you research your future options? >>

Proton NMR

http://filestore.aqa.org.uk/subjects/AQA-CHEM4-W-QP-JAN11.PDF
http://filestore.aqa.org.uk/subjects/AQA-CHEM4-INS-JAN13.PDF

Why is question 5b) d= 3.1-3.9 and not d= 1.2-1.4

thanks

Reply 1

EierVonSatan

1.2-1.4 ppm is peaks you'd find more in an alkane. You have an oxygen connected to the CH2 group, this will increase the ppm to be more like the CH2 in ethanol :smile:

Reply 2

Plantagenet Crown

OCHn typically has a shift of 3-4 ppm.

Reply 3

Zenarthra

Original post by EierVonSatan

1.2-1.4 ppm is peaks you'd find more in an alkane. You have an oxygen connected to the CH2 group, this will increase the ppm to be more like the CH2 in ethanol :smile:

Original post by Plantagenet Crown

OCHn typically has a shift of 3-4 ppm.