IR

Question 1

Fingerprint Region

Answer 1

1400-600 cm^-1

Question 2

Functional Group Region

Answer 2

4000-1400 cm^-1

Question 3

C(triple bond)N

Answer 3

2260-2220 cm^-1

medium

Question 4

C(triple bond)

Answer 4

2260-2100 cm^-1

medium-weak

Question 5

C=C

Answer 5

1680-1600 cm^-1

medium

Question 6

C=N

Answer 6

1650-1550 cm^-1

medium

Question 7

Benzene ring

Answer 7

Around 1600 cm^-1 ; AND 1500-1430 cm^-1

strong-medium

Question 8

C=O

Answer 8

1780-1650 cm^-1
ketone
strong

Question 9

C-O

Answer 9

1250-1050

strong

Question 10

C-N

Answer 10

1230-1020

medium

Question 11

O-H (alcohol)

Answer 11

3650-3200

strong & broad

Question 12

O-H (carboxylic acid)

Answer 12

3300-2500

strong & very broad

Question 13

N-H

Answer 13

3500-3300

medium & broad

Question 14

C-H

Answer 14

3300-2700

medium

Question 15

C(triple bond)C-H
Carbon-Hydrogen bond stretch
sp carbon

Answer 15

Around 3300 cm^-1

Question 16

C=C-H
Carbon-Hydrogen bond stretch
sp^2 carbon

Answer 16

3100-3020 cm^-1

Question 17

C-C-H
Carbon-Hydrogen Bond Stretch
sp^3 carbon

Answer 17

2960-2850 cm ^-1

Question 18

C-H Bending Vibration

sp^3 carbon

Answer 18

Left of 1400 cm^-1

Methyl group in addition to left shows up to the right of 1400

Question 19

C-H Bending Vibration

sp^2 carbons

Answer 19

1000-600 cm^-1

Question 20

N-H Bending Vibration

Answer 20

1600 cm^-1

broader, more intense than C=C