Mass Spectra Interpretation: ALDEHYDES


No. of Questions= 8

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 How many oxygens are in the molecular ion peak in this spectrum?
      Web Reference      
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a) 0
b) 1
c) 2
2 For this same spectrum, choose the compound that the spectrum represents.
      Web Reference      
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a) butanal
b) propanal
c) 2-propenal
d) methoxy-ethene
e) ethanediol
3 Find the alkyl ion series in the spectra below. (Check the hint!)
      Web Reference      
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a) 15, 29, 43
b) 29, 43, 57
c) none
4 Find the alkyl LOSS ion series in the same spectra shown below. (Check the hint!)
      Web Reference      
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a) 15, 29, 43
b) 29, 43, 57
c) none
5 For this same spectrum, choose the compound that the spectrum represents.
      Web Reference      
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a) 2-propenal
b) 2-methyl propanal
c) pentanal
d) 2-oxo-propanal
e) butanal
6 Choose the compound that this spectrum represents.
      Web Reference      
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a) hexanal
b) 3-methyl butanal
c) pentanal
d) 2-methyl propanal
e) 2,2-dimethyl propanal
7 Choose the compound that this spectrum represents.
      Web Reference      
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a) 2-methyl propanal
b) butanal
c) 2-oxo-propanal
d) 2-propenal
e) pentanal
8 Choose the compound that this spectrum represents.
      Web Reference      
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a) 2,2-dimethyl propanal
b) hexanal
c) 2-oxo-propanal
d) 3-methyl-butanal
e) pentanal





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