Asked by Sheree Aulerio on Jun 03, 2024
Verified
If a signal is observed in the 170 to 200 ppm range in a 13C NMR spectrum, what is the most likely type of functional group associated with that carbon atom?
A) carbonyl carbon
B) allylic carbon
C) aromatic carbon
D) carbon/carbon triple bond
E) carbon/carbon double bond
Carbonyl Carbon
The carbon atom that is part of the carbonyl group (C=O), key in various organic compounds like ketones and aldehydes.
Ppm Range
Stands for "parts per million," a unit of concentration that denotes the number of parts of a substance in a million parts of a different substance, often used in chemistry.
- Understand and elucidate the impact of functional groups on nuclear magnetic resonance (NMR) chemical shifts.
Verified Answer
JH
Jessica HildrethJun 06, 2024
Final Answer :
A
Explanation :
The 170 to 200 ppm range in a ^13C NMR spectrum is characteristic of carbonyl carbons, which include groups such as ketones, aldehydes, carboxylic acids, esters, and amides.
Learning Objectives
- Understand and elucidate the impact of functional groups on nuclear magnetic resonance (NMR) chemical shifts.