Mass Spectra Interpretation: ESTERS


No. of Questions= 6

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 Choose the compound that this spectrum represents.
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a) ethyl methanoate
b) methyl ethanoate
c) propanoic acid
d) ethyl ethanoate
e) 2-propenoic acid
2 For this spectrum identify the ion series formed by loss of alkyl fragments.
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a) 15, 29, 43, 57, 71
b) 31, 45, 59, 87, 101
c) none
3 For this same spectrum, choose the compound that the spectrum represents.
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a) methyl pentanoate
b) methyl butanoate
c) butyl ethanoate
d) ethyl butanoate
e) ethyl pentanoate
4 Choose the compound that this spectrum represents.
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a) isopropyl ethanoate
b) butyl formate
c) ethyl ethanoate
d) ethyl propionate
e) ethyl butanoate
5 Choose the compound that this spectrum represents.
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a) ethyl butanoate
b) ethyl pentanoate
c) methyl 3-methylbutanoate
d) ethyl 2-methylpropanoate
e) methyl butanoate
6 Choose the compound that this spectrum represents.
      Web Reference      
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a) ethyl pentanoate
b) methyl butanoate
c) ethyl butanoate
d) 2,2-dimethyl propanoic acid, methyl ester
e) butyl ethanoate





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