Spectroscopy Booklet

Question 1

What is the chemical shift value for aliphatic carbons?

Answer 1

0-40 ppm

Question 2

What is the chemical shift value for aliphatic carbons adjacent to a heteroatom?

Answer 2

40-60 ppm

Question 3

What is the chemical shift value for aromatic and alkene carbons?

Answer 3

100-160 ppm

Question 4

What is the chemical shift value for carbonyl carbons of acids and esters?

Answer 4

165-185 ppm

Question 5

What is the chemical shift value for carbonyl carbons of ketones and aldehydes?

Answer 5

190-220 ppm

Question 6

What is the peak value for a free O-H bond stretch?

Answer 6

3500 -3300 cm

Question 7

What is the peak value for and O-H bond stretching in a carboxylic acid?

Answer 7

3000-2500 cm

Question 8

What is the peak value for a C-N triple bond stretch?

Answer 8

2250 (2260-2200) cm

Question 9

what is responsible for a peak at 1300-1000cm?

Answer 9

C-O stretches

Question 10

What is responsible for a peak at 1470-1660 cm?

Answer 10

C-C stretches in an aromatic compound.

Question 11

What is the peak value for a C-H bond bending?

Answer 11

1500 cm

Question 12

What is the peak value for an N-H bond bending?

Answer 12

1600 cm

Question 13

What is the peak value for an aliphatic C-H stretch?

Answer 13

< 3000 cm

Question 14

What is the peak value for an aromatic C-H Stretch?

Answer 14

> 3000 cm