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Mass Spectrometry ,[object Object],[object Object],[object Object],[object Object]

Mass Spectrometry THE MAIN USE OF MS IN ORG CHEM IS: ,[object Object],[object Object],[object Object],[object Object]

HOW DO WE ACHIEVE THIS? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

IONIZING METHODS ,[object Object],[object Object]

ELECTRON IMPACT RADICAL CATION ONLY CATIONS ARE CARRIED TO DETECTOR CATION RADICAL BOND-BREAKING

MS of METHANE So what does a typical ms looks like???? m/z

C H H H H H . . H C . . . . . . H H

. . . . . H . . H C . . . . . . H H +

Electron Impact Ionization ,[object Object],=>

Separation of Ions ,[object Object],[object Object],[object Object],[object Object]

The Mass Spectrum ,[object Object],=>

M.S. Spectrum 142 g/mol – 113 g/mol = 29 g/mol

M.S. Spectrum Why is there a small peak at 109 g/mol?

The GC-MS => A mixture of compounds is separated by gas chromatography, then identified by mass spectrometry.

High Resolution MS ,[object Object],[object Object],[object Object],C 3 H 8 C 2 H 4 O CO 2 CN 2 H 4 44.06260 44.02620 43.98983 44.03740 =>

Molecules with Heteroatoms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mass Spectrum with Chlorine =>

Mass Spectrum with Bromine =>

Mass Spectra of Alkanes ,[object Object],=>

Mass Spectra of Alkenes ,[object Object],=>

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