1. 13C NMR
SPECTROSCOPY

2. Relative size of signals
1H NMR
13C NMR
Relative size of signals
1H atoms
area of signals for 1H atoms
Determines number of H+
13C atoms
No link between area of signal to number of 13C atoms
Splitting of signals
Signal split by 1H atoms on adjacent atom(s)
No splitting.
No Integration calcuations
So, All you have to do is count CARBON Environments

3. Data from AQA datasheet
CARBON SIGNALS 4
Data from AQA datasheet

4. CARBON SIGNALS 2, Symmetry
Data from AQA datasheet

5. ID the shifts and signals
TASK:
ID the shifts and signals
 5-40
 5-40
 5-40
 10-70
4 signals, 4 peaks
The values for the chemical shifts are 20X greater

6. ID the shifts and signals
TASK:
ID the shifts and signals 
3 signals, 3 peaks 
 5-40
Watch for Symmetry
 5-40
 10-70
2 signals, 2 peaks
CH3 same , 1 signal

7. ID the shifts and signals
TASK:
ID the shifts and signals
5 signals
 20-50
 50-90
 5-40 
 5-40

8. Propose a 13 C spectra for this
Ethanol
Propose a 13 C spectra for this

9. Data from AQA datasheet

10. Predict the number of signals
3 - methylpentane

11. Predict the number of signals
Cyclohexane

12. Predict the number of
CARBON signals
4-pentenoic acid

13. CARBON-13 NMR SPECTRA - QUESTIONS
Identify the isomers of C6H12
Which belongs with which?
3-methyl-2-pentene
cyclohexane
2,3-dimethylbut-2-ene

14. CARBON-13 NMR SPECTRA - QUESTIONS
Identify the isomers of C6H12
Which belongs with which?
X = 3-methyl-2-pentene
Y = cyclohexane
Z = 2,3-dimethylbut-2-ene

15. CARBON-13 NMR SPECTRA - QUESTIONS
Identify the isomers of C6H12
1=X hex-1-ene
2=Y cyclohexane
3=Z 2,3-dimethylbut-2-ene