IR Wavenumber Values

Question 1

O-H alcohol no H bonding

Answer 1

Stretching - 3640-3580

Question 2

O-H alcohol no H bonding

Answer 2

Stretching - 3600-3200

Question 3

N-H amides

Answer 3

Stretching - 3500-3350

Question 4

N-H amines

Answer 4

Stretching - 3450-3200

Question 5

C-H alkynes

Answer 5

Stretching - 3300-3200

Question 6

C-H aromatic

Answer 6

Stretching - 3100-3000
Bending - 880-660

Question 7

C-H alkenes

Answer 7

Stretching - 3060-3020
Bending - 1000-700

Question 8

C-H alkanes

Answer 8

Stretching - 2980-2860
Bending - 1470-1320

Question 9

C-H aldehydes

Answer 9

Stretching - 2900+, 2700+ (2 bands)

Question 10

O-H acids H bonding

Answer 10

Stretching - 3000-2500
Bending - 1655-1510

Question 11

C(triple bond)C alkynes

Answer 11

Stretching - 2260-2120

Question 12

C(triple bond)N nitrile

Answer 12

Stretching - 2260-2220

Question 13

C=O ester

Answer 13

Stretching - 1750-1735

Question 14

C=O aldehyde

Answer 14

Stretching - 1740-1720

Question 15

C=O ketone

Answer 15

Stretching -1725-1705

Question 16

C=O acid

Answer 16

Stretching - 1725-1700

Question 17

C=O aryl ketone

Answer 17

Stretching - 1700-1680

Question 18

C=O amide

Answer 18

Stretching - 1690-1650

Question 19

C=O alpha,beta unsaturated ketone

Answer 19

Stretching - 1685-1665

Question 20

C=C alkene

Answer 20

Stretching - 1680-1620

Question 21

C=C aromatic

Answer 21

Stretching - 1600-1450

Question 22

C-O alcohols, esters, ethers

Answer 22

Stretching - 1300-1000

Question 23

C-N amines and alkyl

Answer 23

1220-1020