Look at Figure 29.25, which shows the mass spectrum of ethanol, C₂H₅OH. A structural isomer of ethanol is methoxymethane, an ether with the formula CH₃OCH₃.

a. Predict the mass-to-charge ratio of a fragment that would appear on the mass spectrum of methoxymethane but does not appear on ethanol’s mass spectrum.

b. Give the formula of the ion responsible for the peak in your answer to part a.

c. Look at the mass spectrum of ethanoic acid:

Identify the fragments with mass-to-charge ratios of:

i. 15

ii. 43

iii. 45

iv. 60

Transcribed Image Text:

[CH,OH)* 100 E 80 60 [C,H;J* [GH;0]* 40 [C,H;OH)* 20 M + 1] 10 20 30 40 50 Mass-to-charge ratio, m/e Figure 29.25 The mass spectrum of ethanol, showing the [M + 1] peak. Relative abundance (9%)