13C NMR

Question 1

C-C

Answer 1

0-50

Increase with number of R groups attached

Question 2

C-N

Answer 2

~50

Question 3

C-Cl

Answer 3

~25

Question 4

C-X

Answer 4

20-80

Increases with electronegativity of X

Question 5

C-O

Answer 5

~70

Question 6

C≡C

Answer 6

~80

Question 7

C=C

Answer 7

~130

Question 8

Aromatic C-C

Answer 8

~125

Question 9

c=C-O

Answer 9

~150

Question 10

C=O (ketone)

Answer 10

~200+

Question 11

C=O (aldehyde)

Answer 11

~200-

Question 12

C=O (acid derivative)

Answer 12

160-170

Less than ketone/aldehyde due to electron donating heteroatoms