Draw the molecular ion (M*) for this molecule formed in the mass spectrometer. H. H -e-

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Match the molecular ion (from electron impact mass spectrometry) with the correct compound. (Make sure to consider the isotope pattern if necessary) 1001 50 Br A 121 B 122 B NH 123 123 Mass M/e 124 124 Me C 125 125 OH НО. 126 D CI 127

14. Shown below are the mass spectra (without data tables) of four molecules. (The structure of each molecule is shown on the spectrum.) Mark the [M] peak for each, and indicate the molecular weight of the molecule. Relative Intensity Relative Intensity 100 80 60 40- 20 0-mm 10 100- 80 a. 20- 115-14-5501 0-mm 10 20 b. =0 20 30 30 40 40 50 50 60 m/z 60 m/z 70 70 80 80 90 100 90 100 Relative Intensity Relative Intensity 100- 80 40 20 0 100 80 40 10 20- 15-NU-5580 15 20 25 115--555 ont 10 20 30 30 35 40 45 50 55 m/z 40 50 m/z 60 60 70 65 70 75 80 Based on the five mass spectra you have seen, describe how one might identify the [M]* peak (molecular ion peak) on the mass spectrum of an unknown compound.

1. Sketch and label the main parts of the mass spectrometer. 2. Give detail description about how it works.

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Match the molecular ion (from electron impact mass spectrometry) with the correct compound. (Make sure to consider the isotope pattern) 100 120 Br A 121 x B NH ន 122 Mass M/e 123 123 Me 124 124 OH но ма 125 D 126

Please answer g only

The mass spectrum below belongs to a compound that contains: Relative Intensity 100- 8 90 20- MS2011-04537CM 0-tbn Chlorine Bromine Fluorine Oxygen 25 50 75 m/z maltempl 100 125

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