Electron Ionization Mass Spectrometry Figure 15 21 Copyright

Electron Ionization - Mass Spectrometry Figure 15. 21 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

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Figure 15. 22 a 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.

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

https: //www 2. chemistry. msu. edu/faculty/reusch/Org. Page/mass. htm

Figure 15. 26 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

Figure 15. 28 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

C 7 H 16 M+ at m/z = 100 Unnumbered 15 p 715 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

“Picket Fence” = straight chain alkane Figure 15. 30 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

Cleavage of Alcohols Unnumbered 15 p 715 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

Amines Unnumbered 15 p 716 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

Carbonyls M - alkene

X = 28, 42, 56, 70 etc Table 15. 3 Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.

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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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