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ORGANIC CHEMISTRY EXAM 3 2026
ACTUAL QUESTIONS WITH VERIFIED
ANSWERS.
Chemical shift downfield caused by - correct answer-when near
a en atom; shielding decreases
Downfield - correct answer-to the left, higher nmr, deshielded
Upfield - correct answer-to the right, lower nmr, shielded
Shielding decreases w/ - correct answer-1) nearby en atoms
2) increasing "s" character
Sp=furthest downfield
Sp3, alkanes, found on nmr - correct answer-~1, 0.8-1.7
Sp2, alkenes, found in nmr - correct answer-~5 (4.6-5.7)
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Sp, alkynes, found in nmr - correct answer-~ 2
Aldehyde (h-c=o) found in nmr - correct answer-~ 10
Benzene ring nmr (sp2) - correct answer-~ 7
Intensity of singals w/ nmr - correct answer-ratio of h atoms
(non-equivalent protons)
Splitting of signals - correct answer-n +1, how many diff. H's it
sees w/in 3 bonds + 1
M (multiplet of multiplets) - correct answer-multiplet, sees 2
groups of nonequiv. Hs
Nmr remember - correct answer-peaks overlap, so might not
necessarily see m of m
ORGANIC CHEMISTRY EXAM 3 2026
ACTUAL QUESTIONS WITH VERIFIED
ANSWERS.
Chemical shift downfield caused by - correct answer-when near
a en atom; shielding decreases
Downfield - correct answer-to the left, higher nmr, deshielded
Upfield - correct answer-to the right, lower nmr, shielded
Shielding decreases w/ - correct answer-1) nearby en atoms
2) increasing "s" character
Sp=furthest downfield
Sp3, alkanes, found on nmr - correct answer-~1, 0.8-1.7
Sp2, alkenes, found in nmr - correct answer-~5 (4.6-5.7)
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Sp, alkynes, found in nmr - correct answer-~ 2
Aldehyde (h-c=o) found in nmr - correct answer-~ 10
Benzene ring nmr (sp2) - correct answer-~ 7
Intensity of singals w/ nmr - correct answer-ratio of h atoms
(non-equivalent protons)
Splitting of signals - correct answer-n +1, how many diff. H's it
sees w/in 3 bonds + 1
M (multiplet of multiplets) - correct answer-multiplet, sees 2
groups of nonequiv. Hs
Nmr remember - correct answer-peaks overlap, so might not
necessarily see m of m
