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Author Question: True or false, both mass spectrometry and infrared spectroscopy involve the interaction of molecules ... (Read 118 times)

vicky

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on: Aug 23, 2018
True or false, both mass spectrometry and infrared spectroscopy involve the interaction of molecules with electromagnetic energy?
  Indicate whether the statement is true or false

Question 2

Could you distinguish 2,2-dimethylbutane from 2-methylpentane using mass spectrometry?


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hollysheppard095

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Reply #1 on: Aug 23, 2018
Answer to Question 1

FALSE

Answer to Question 2

Yes, although M+ at m/z = 86 for both compounds is identical, the fragmentation patterns of the two compounds should show two major differences. We would expect 2,2-dimethylbutane to have significant peaks at m/z = 57, corresponding to C4H9, and m/z = 71, corresponding to C5H11 . Fragmentation of 2-methylpentane should produce significant peaks at m/z = 43, corresponding to C3H7, and m/z = 57, corresponding to C4H9.


vicky

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Reply 2 on: Aug 23, 2018
YES! Correct, THANKS for helping me on my review

marict

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Reply 3 on: Yesterday
:D TYSM

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