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Mass Spectra Interpretation: ALCOHOLS


No. of Questions= 9

ELECTRON IMPACT MASS SPECTROMETRY PRODUCED THE SPECTRA BELOW. MANY PEAKS ARE LABELLED TO AID INTERPRETATION: M/Z (RELATIVE ABUNDANCE).

LOOK AT THE HINTS AND FOLLOW THE WEB REFERENCE LINK FOR HELP. YOU WILL NEED A PERIODIC TABLE, A TABLE OF COMMON ISOTOPES (WHICH YOU CAN FIND IN THE WEB REFERENCE), A CALCULATOR, AND SCRATCH PAPER TO WORK THIS QUIZ.


1 Identify the molecular ion in this spectrum.
            
Click on image to enlarge
a) 45
b) 46
c) 47
2 For this same spectrum, choose the compound that the spectrum represents.
            
Click on image to enlarge
a) formic acid
b) 1-propanol
c) ethanol
d) methanol
e) isopropyl alcohol
3 Find the alkyl ion series in the spectrum below. (Check the hint!)
            
Click on image to enlarge
a) 15, 29, 43, 57
b) 31, 45
c) none
4 Find the alkyl LOSS ion series in the same spectra shown below. (Check the hint!)
            
Click on image to enlarge
a) 15, 29, 43, 57
b) 31, 45
c) none
5 For the same spectrum shown in the previous two questions, choose the compound that the spectrum represents.
            
Click on image to enlarge
a) 2-methyl-2-propanol
b) 1-butanol
c) 2-butanol
d) 1-pentanol
e) 2-methyl-1-propanol
6 Identify the molecular ion in this spectrum.
            
Click on image to enlarge
a) 70
b) 71
c) 87
d) 88
7 For the same spectrum, choose the compound that the spectrum represents.
            
Click on image to enlarge
a) 1-hexanol
b) 1-pentanol
c) 2-methyl-2-butanol
d) 2-pentanol
e) 1-butanol
8 Choose the compound that this spectrum represents.
            
Click on image to enlarge
a) 2-methyl-2-butanol
b) 2-methyl-2-propanol
c) 2-butanol
d) 1-butanol
e) 2-methyl-1-propanol
9 Choose the compound that this spectrum represents.
            
Click on image to enlarge
a) 2-pentanol
b) 2-methyl-2-propanol
c) 1-butanol
d) 2-methyl-1-propanol
e) 2-butanol





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