IR and NMR

Question 1

What is the frequency of alcohol and phenol O-H?

Answer 1

3200-3600 broad stretch

Question 2

What is the frequency of carboxylic acid O-H?

Answer 2

2500-3000 broad stretch

Question 3

What is the frequency of Amine N-H?

Answer 3

3300-3500

Question 4

What is the frequency of amide N-H?

Answer 4

3350-3500

Question 5

What is the frequency of Alkane C-H?

Answer 5

<3000

Question 6

What is the frequency of Alkene C-H?

Answer 6

> 3000

Question 7

What is the frequency of alkyne C-H?

Answer 7

~3300

Question 8

What is the frequency of aldehyde C-H?

Answer 8

2820 and 2720

Question 9

What is the frequency of Nitrile C=N?

Answer 9

~2200

Question 10

What is the frequency of Alkyne C (triple bond) C?

Answer 10

~2100

Question 11

What is the frequency of ketone C=O?

Answer 11

1715

Question 12

What is the frequency of aldehyde C=O?

Answer 12

1725

Question 13

What is the frequency of esters C=O?

Answer 13

1735

Question 14

What is the frequency of carboxylic acid C=O?

Answer 14

1710

Question 15

What is the frequency of amide C=O?

Answer 15

1650

Question 16

What is the frequency of alkene C=C?

Answer 16

1620-1680

Question 17

What is the frequency of aromatic C=C?

Answer 17

1600, 1500, 1450

Question 18

What is the frequency of alcohol, ester, ether C-O?

Answer 18

1050-1300

Question 19

NMR spectra: aliphatic C-H

Answer 19

0-2

Question 20

NMR spectra: CH on C next to pi bonds X=C-C-H

Answer 20

2-3

Question 21

NMR spectra: C-H where C is attached to an electronegative atom X-C-H

Answer 21

3-4

Question 22

NMR spectra: Alkene =C-H

Answer 22

4-6

Question 23

NMR spectra: Aryl CH

Answer 23

9-6

Question 24

NMR spectra: aldehyde COH

Answer 24

9-10

Question 25

NMR spectra: acid COOH

Answer 25

10-12

Question 26

NMR spectra: Equation for number of hydrogens

Answer 26

N=

N+1