The chemical environment of protons can be deduced from their chemical shifts. W

Question

The chemical environment of protons can be deduced from their chemical shifts. What are the relative chemical shifts of the protons at the labeled positions? [Protons that are highly shielded have low delta (chemical shift) values.]

The proton with the lowest delta value (the most shielded) is .____
The proton with the highest delta value (the most deshielded) is______

The proton with the lowest delta value (the most shielded) is ______
The proton with the highest delta value (the most deshielded) is _____

Explanation / Answer

1 )

The proton with the lowest delta value (the most shielded) is .___a_
The proton with the highest delta value (the most deshielded) is____b__

explanation :

benzene proton has delta value = 6.5 to 8.5

-O-CH2 protons delta value = 4 nearly

2)

The proton with the lowest delta value (the most shielded) is _b_____
The proton with the highest delta value (the most deshielded) is _____a

explanation :

benzene proton has delta value = 6.5 to 8.5

-N-CH2 -CH3   protons (bolded ) delta value = 1.2 to 1.5 nearly

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