Part A Which of the underlined protons (or sets of protons) has the greater chem

Question

Part A Which of the underlined protons (or sets of protons) has the greater chemical shift (that is, the higher frequency signal)? CH3CH2CH2Cl or CH3CH2CH2Br Submit My Answers Give U Part B Which of the underlined protons (or sets of protons) has the greater chemical shift (that is, the higher frequency signal)? CH CH CH Cl or CH CH CHCH Cl Submit My Answers Give U Part C Which of the underlined protons (or sets of protons) has the greater chemical shift (that is, the higher frequency signal)? CH3CH CH or CH CH C OCH Submit My Answers Give Up

Explanation / Answer

1. Part A: Option 1 is correct. This is because Cl atom is more electronegative than that of Br. Hence the proton attahced to Ck atom will be deshielded.

1. Part B: Option 1 is correct. Due to inductive effect of methyl group (acts as electron donor) the atom 2 is more shielded than the atom 1.

1. Part C: Option 1 is correct. This is because the aldehydic proton is much more deshielded than the ester proton.

2. Part A: The order of increasing order of chemical shift a < b < c is correct because of inductive effects.

3. Part A: Option 1 is correct. This is because F is the most electronegaive atom. hence it has highest chemical shieft values.

4. option 4 is correct answer because this compound has C2 symmetry. hence it shows 4 cemical shieft values

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