Mass spectral analysis of 3,3-dimethyl-2-butanone results in several fragmentation pathways. Complete the mechanism and draw the products for the fragmentation pathway that produces a mass spectrum peak at mlz 43. Include all nonbonding electrons and charges. a-cleavage H3C. a-cleavage products radical cationic CH3 intermediate H3C CH3

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Mass spectral analysis of 3,3-dimethyl-2-butanone results in several fragmentation pathways. Complete the mechanism and draw
the products for the fragmentation pathway that produces a mass spectrum peak at mlz 43. Include all nonbonding electrons
and charges.
-e-
a-cleavage
a-cleavage
products
H3C.
radical cationic
CH3
intermediate
H3C|
CH3
Add electrons and the charge for the resulting radical
Draw the a-cleavage products (one cation and one
cationic intermediate, and add curved arrows for the
neutral radical) that are consistent with a peak at mlz 43.
a-cleavage mechanism en route to m/z 43.
Include all nonbonding electrons.
Select
Draw
Rings
More
Erase
Select
Draw
Rings
More
Erase
Reset Drawing
C
H
H,C
CH,
H;C
CH;
Transcribed Image Text:Mass spectral analysis of 3,3-dimethyl-2-butanone results in several fragmentation pathways. Complete the mechanism and draw the products for the fragmentation pathway that produces a mass spectrum peak at mlz 43. Include all nonbonding electrons and charges. -e- a-cleavage a-cleavage products H3C. radical cationic CH3 intermediate H3C| CH3 Add electrons and the charge for the resulting radical Draw the a-cleavage products (one cation and one cationic intermediate, and add curved arrows for the neutral radical) that are consistent with a peak at mlz 43. a-cleavage mechanism en route to m/z 43. Include all nonbonding electrons. Select Draw Rings More Erase Select Draw Rings More Erase Reset Drawing C H H,C CH, H;C CH;
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