Hello! I have a few questions related to NMR that I would love clarification on, thank you so much!

Quote from: amimi on February 17, 2026, 12:44:43 AMHello! I have a few questions related to NMR that I would love clarification on, thank you so much!

There are 3 integrated signal groups visible:

one smaller signal near ~2.4 ppm nearly for 2H

one medium signal near ~2.1 ppm nearly for 3 H

one largest signal near ~1.0 ppm nearly for 9H
S the ratio is 2:3:9
With this molecule is A
Option c is type structure (CH₃COCH₂C(CH₃)3), which gives:

6H from the two equivalent tert-butyl groups → big signal near ~1.0 ppm

CH₃ next to C=O (3H) around ~2.1 ppm

CH₂ next to C=O (2H) around ~2.3–2.5 ppm