Organic chem mass spectrum question Please only answer if you can answer ALL of

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Organic chem mass spectrum question

Please only answer if you can answer ALL of the questions. thanks!

Mass Spectrum of methyl benzoate

Mass Spectrum of recrystallized nitration product

8. Look at the mass spectrum of methyl benzoate. 1. What is the m/z of the parent molecule? [M] 2. There is a m/z peak at 105 amu which indicates loss of amu which indicates a likely loss of what atoms? 3. This is indicative of a functional group. 4. There is a mlz peak at 77 amu which indicates loss of amu which indicates a likely loss of what atoms? 5. This is indicative of a functional group. 9. Look at the mass spectrum of the recrystallized nitration product. 1. What is the m/z of the parent molecule [M]*- 2. There is a m/z peak at 150 amu which indicates loss of amu which indicates a likely loss of what atoms? 3. This is indicative of a functional group. 4. There is a m/z peak at 104 amu which indicates loss of amu which indicates a likely loss of what atoms? 5. This is indicative of a functional group.

Explanation / Answer

8.

1. [M]+=136

It is the exact mass of methyl benzoate

2. 31, CH3O

loss of OCH3 from the methyl benzoate corrosponds to peak of 105 amu

3. This is indicative of alkoxy (methoxy) functional group

4. 59, C2H3O2

5. This is indicative of ester functional group

9.

1. [M]+=181

It is the exact mass of methyl 3-nitrobenzoate

2. 31, CH3O

loss of OCH3 from the methyl 3-nitrobenzoate corrosponds to peak of 150 amu

3. This is indicative of alkoxy (methoxy) functional group

4. 77, CH3O & NO2

5. This is indicative of nitro & methoxy functional group

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