Mass Spectra Interpretation: AMIDES


No. of Questions= 7

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 Compounds containing C, H, O atoms will have molecular weights that are even numbers. However, if one nitrogen is added the molecular weight will be an odd number. Test this by calculating the molecular weight of butanamide (CH3CH2CH2CONH2).
Web Reference      
a) 85
b) 86
c) 87
d) 88
2 Find the alkyl LOSS ion series in the spectra shown below. (Check the hint!)
      Web Reference      
Click on image to enlarge
a) 29, 43, 57
b) 44, 58, 72
c) none
3 For this same spectrum, choose the compound that the spectrum represents.
      Web Reference      
Click on image to enlarge
a) propanamide
b) acrylamide
c) glycine
d) thiocyanic acid, methyl ester
e) N,N-dimethylformamide
4 Choose the compound that this spectrum represents.
      Web Reference      
Click on image to enlarge
a) N,N-diethylacetamide
b) N,N-diisopropylformamide
c) pentanamide
d) N-butylacetamide
e) hexanamide
5 Choose the compound that this spectrum represents.
      Web Reference      
Click on image to enlarge
a) 2,2-dimethylpropanamide
b) pentanamide
c) N-(n-Propyl)ethanamide
d) hexanamide
e) N,N-dimethylacetamide
6 Choose the compound that this spectrum represents.
      Web Reference      
Click on image to enlarge
a) butanamide
b) 2,2-dimethylpropanamide
c) N,N-dimethylacetamide
d) morpholine
e) propanamide
7 Choose the compound that this spectrum represents.
      Web Reference      
Click on image to enlarge
a) hydroxyacetonitrile
b) urea
c) isocyanatomethane
d) methyl nitrite
e) nitro methane





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