mass spec problems (3 pictures 6 problems) the following s mass spec. What A C-3

Question

mass spec problems (3 pictures 6 problems) the following s mass spec. What A C-3 compound is the bondline formula for the compound? containing one oxygen and one degree of unsaturation gives the followin MASS SPECTRUM 100 80 60 40 20 0.0 40 50 60 10 20 30 m/z NIST Chemistry WebBook (http://webbook.nist.gov/chemistry) ing mas s spec. V 3 compound containing one oxygen and one degree of unsaturation gives the follow A C- is the bondline formula for the compound? MASS SPECTRUM 100 80 2 60 40 20 0.0 50 60 70 40 m/z 10 20 30

Explanation / Answer

1) C 3 compound is CH3-CO-CH3 (M+ = 58, m/z = 43 for CH3-CO+)

2) C3 compound is CH3-CH2-CHO (M+ = 58. m/z = 29 for CH3-CH2+)

3) C4 compound is CH3-CH=CH-CH3 (M+ = 58, m/z = 41 for +CH=CH-CH3, m/z = 28 for +CH-CH3)

4) C4 compound is CH3-CH2-CH=CH2 (M+ = 58, m/z = 41 for CH2-CH=CH2+)

5) C4 compound is CH3-CH2-CH(OH)-CH3 (m/z = 44 for C(OH)-CH3)

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