Spectroscopy

Question 1

What do the peaks represent in a mass spectrum?

Answer 1

ionized fragments of the sample

Question 2

What is the function of IR spectroscopy?

Answer 2

to identify certain functional groups

Question 3

What is the “fingerprint region” of an IR Absorption?

Answer 3

1-1500 cm region, not very helpful

single bonds to C

Question 4

What does the ~ 1710 cm wavelength indicate on an IR Spec?

Answer 4

double bonds to C: (C,O,N)
C=C
C=O
C=N

Question 5

What does the ~ 2100 cm wavelength indicate on an IR Spec?

Answer 5

triple bonds:

Question 6

What does the ~ 3100 cm wavelength indicate on an IR Spec?

Answer 6

C-H

Question 7

What does the ~ 3200 cm wavelength indicate on an IR Spec?

Answer 7

O-H

Question 8

What does the ~ 3300 cm wavelength indicate on an IR Spec?

Answer 8

N-H

Question 9

What do bonds ~ 3000 and over indicate on an IR Spec?

Answer 9

single bonds to H: (C, O, N)

Question 10

What is the purpose of using mass spectrometry?

Answer 10

to determine the molecular weight of a compound and its molecular structure

Question 11

What is the “base peak” in mass spec?

Answer 11

the tallest peak

Question 12

What is “M” in mass spec?

Answer 12

it is the molecular weight, and this represents the molecule