IR Spectrum

Question 1

Answer 1

3000-3100 cm^-1

weak intensity

(*above 3000)

Question 2

Answer 2

2850-3000 cm^-1

medium intensity

(*below 3000)

Question 3

Answer 3

Not useful for interpretation - too many bands

Question 4

Answer 4

1600-1680 cm^-1

weak to medium intensity

Question 5

Answer 5

2100-2250 cm^-1

weak intensity

Question 6

Answer 6

3300 cm^-1

Medium to strong intensity

(*well above 3000)

Question 7

Answer 7

3030 cm^-1

weak to medium intensity

Question 8

Answer 8

1450-1600 cm^-1

medium

Question 9

Answer 9

3200-3650 cm^-1

weak to strong intensity

when hydrogen bonded: strong and broad

(*large broad lump between 3000 and 4000)

Question 10

Answer 10

3100-3550 cm^-1

medium intensity

Question 11

Answer 11

1000-1250 cm^-1

ether - strong intensity

alcohol - medium intensity

Question 12

Answer 12

1630-1820 cm^-1

strong intensity

Question 13

Answer 13

1: 1630-1820 cm^-1 - strong
2: 2720 cm^-1 - weak

Question 14

Answer 14

1: 1700-1725 cm^-1 - strong
2: 2500-3000 - strong (broad)

Question 15

Answer 15

1: 1630-1680 cm-1 - strong
2: 3200, 3400 cm-1 - medium

primary amides have 2 stretches, secondary amides have 1

Question 16

Answer 16

1: 1735-1800 cm^-1 - strong
2: 1000-1100 cm^-1 - strong
3: 1200-1250 cm^-1 - strong

Question 17

Answer 17

1: 1740-1760 cm^-1 and 1800-1850cm^-1 - strong intensity
2: 900-1300 cm^-1 - strong intensity

Question 18

Answer 18

2200-2250 cm^-1 - medium intensity