IR Absorptions

Question 1

Alkanes

Answer 1

2,800-3,000 (C-H); 1,200 (C-C)

Question 2

Alkenes

Answer 2

3,080-3,140 (=C-H); 1,645 (C=C)

Question 3

Alkynes

Answer 3

2,200 (C=_C); 3,300 (=_C-H)

Question 4

Aromatic

Answer 4

2,900-3,100 (C-H); 1,475-1,625 (C-C)

Question 5

Alcohols

Answer 5

3,100-3,500 (broad)

Question 6

Ethers

Answer 6

1,050-1,150 (C-0))

Question 7

Aldehydes

Answer 7

2,700-2,900 ((O)c-H); 1,725-1,750 (C=O)

Question 8

Ketones

Answer 8

1,700-1,750 (C=O)

Question 9

Acids

Answer 9

1,700-1,750 (C=O); 2,900-3,300 (broad)

Question 10

Amines

Answer 10

3,100-3,500 (sharp)