OCHEM 3
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Last updated 2:20 AM on 6/25/25
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15 Terms
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Deshielded means
hydrogens are closer to EN atoms or pi bonds
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1 ppm
alkyl (primary) —CH3
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2-2.5 ppm
allylic
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3.5 ppm
alcohol, ether
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6 ppm
vinylic
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7 ppm
aryl
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10-12 ppm
aldehyde/carboxylic acid
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What are the exceptions to the n+1 rule?
alcohol hydrogens (-OH) and amine hydrogens (-NH-) will form a broad singlet
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Which proton equivalence have different chemical shifts?
Heterotopic (CI) and Diastereotopic
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Which proton equivalence has the same chemical shifts?
Homotopic (same) and Enantiotopic
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On alkenes it treats the neighbors as?
two separate thing resulting in a doublet of doublets
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Note 
Flashcards (20)