Electron Ionization - Mass Spectrometry

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Electron Ionization - Mass Spectrometry Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Figure 15.21

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Unnumbered 15 p707

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Figure 15.22a

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Figure 15.23

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Figure 15.25

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Unnumbered 15 p709

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

https://www2.chemistry.msu.edu/faculty/reusch/OrgPage/mass.htm

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Figure 15.26

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Figure 15.28

C7H16 M+ at m/z = 100 Unnumbered 15 p715 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Unnumbered 15 p715

“Picket Fence” = straight chain alkane Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Figure 15.30

Cleavage of Alcohols Unnumbered 15 p715 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Unnumbered 15 p715

Amines Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Unnumbered 15 p716

Carbonyls M - alkene

X = 28, 42, 56, 70 etc Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Table 15.3

Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Unnumbered 15 p717

High Resolution MS (HRMS) Low resolution mass spectrometers report m/z values to the nearest whole number. High resolution mass spectrometers measure m/z ratios to four (or more) decimal places. This is valuable because no two molecular formulas have the same exact molecular weight. Exact MWs can be calculated using exact isotope masses. Table 14.1 Thus HRMS is a way to determine chemical formula!

GC-MS

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