Spectroscopy

Question 1

What is the absorption frequency of O-H and N-H?

Answer 1

3400

Question 2

What is the absorption frequency of sp C-H?

Answer 2

3300

Question 3

What is the absorption frequency of sp2 C-H?

Answer 3

3100-3000

Question 4

What is the absorption frequency of sp3 C-H?

Answer 4

3000-2850

Question 5

What is the absorption frequency of C-C triple bond and C-N triple bond?

Answer 5

2100

Question 6

What is the absorption frequency of C=O?

Answer 6

1700

Question 7

What is the absorption frequency of C=C, aromatic C-C ?

Answer 7

1600

Question 8

What is the absorption frequency of aromatic C-C?

Answer 8

1500

Question 9

What is the H NMR shift for sp3 C ?

Answer 9

1

Question 10

What is the H NMR shift for C atom in a pi system?

Answer 10

2

Question 11

What is the H NMR shift for C attached to O atom?

Answer 11

3-4

Question 12

What is the H NMR shift for sp2 C ?

Answer 12

5-6

Question 13

What is the H NMR shift for an aromatic C atom ?

Answer 13

7-8

Question 14

What is the H NMR shift for aldehyde C atom?

Answer 14

10

Question 15

What is the H NMR shift for the Oxygen in carboxylic acid ?

Answer 15

11-12

Question 16

What is the C NMR shift for an sp3 alkyl C atom

Answer 16

10-30

Question 17

What is the C NMR shift for sp3 C attached to O,N,X ?

Answer 17

50-70

Question 18

What is the C NMR shift for sp C atom

Answer 18

75-90

Question 19

What is the C NMR shift for sp2 C atom?

Answer 19

100-150

Question 20

What is the C NMR shift for ester, amide, or carboxyl C=O ?

Answer 20

160-180

Question 21

What is the C NMR shift for an aldehyde or ketone C=O?

Answer 21

190-200