MS Review.

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Presentation transcript:

MS Review

1. The mass spectrum of an unknown compound shows the following peaks 1. The mass spectrum of an unknown compound shows the following peaks. Determine the molecular formula and propose a structure. m/z Relative Abundance 43 100 (base) 78 23.6 (M) 79 1.00 80 7.55 81 0.25

3. The EI mass spectra of the following two ethers are shown below.

5. How many C atoms does the following molecule most likely contain 5. How many C atoms does the following molecule most likely contain? (M = 228)