41. There are some additional \'rules\" that help in the interpretation of mass

Question

41. There are some additional 'rules" that help in the interpretation of mass spectra. a Alcohols typically lose the hydrogen on the oxygen and ofhten water (mass of 18) and have a very smal parent ion. b. Compounds that contain an odd number of nitrogen have an odd molecular mass. c. Carbonyl compounds tend to cleave next to the C-O ed on these new rules determine which of the following spectra correspond to n-butyl amine, butanol, and diethylketone. Explain your reasoning MASS SPECTRUM 00 15 0 45 60 75 90 10 20 30 NIST Chemistry WebBook Onttip /webbook.nist NIST Chemistry WebBook (hetpilwebbook nist.gowichemistry) MASS SPECTRUM 0.0 20 40 100 NIST Chemistry WebBock (httpllweblbook nist govchemistry)

Explanation / Answer

A. Butanol  

B.n-butyl amine, m/z 73 contain odd Nitrogen or odd mass number, m/z =30 CH2NH2 +

C.diethyl ketone, m/z =86 molecular ion peak, m/z =29 C2H5+, fragmentation next to carbonyl.

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