In carbon NMR, the carbon atom of the carbonyl group in aldehydes and ketones has a chemical shift of about ________.
A) 20 ppm
B) 40 ppm
C) 60 ppm
D) 120 ppm
E) 200 ppm

Question

Quizplus · Accepted Answer

The carbon atom of the carbonyl group in aldehydes and ketones typically has a chemical shift of about 200 ppm in carbon NMR, reflecting its highly deshielded state due to the electronegative oxygen atom.

In Carbon NMR, the Carbon Atom of the Carbonyl Group