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QUESTION 6 6) Which of the following methyl protons has the HIGHST chemical shift in 1H...

QUESTION 6

6) Which of the following methyl protons has the HIGHST chemical shift in 1H NMR spectrum?

A)  CH3CH2F

B)  CH3CHF2

C)  CH3CHCl2

D)  CH3CH2CHCl2  
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Homework Answers

Answer #1

Explanation:

  1. As electronegativity of substituent on C bearing H increases, proton shift increases.
  2. Hence fluro compounds must have protons with higher chemical shift as electronegativity of F is more than Cl.
  3. Also as no. of such substituents increases, chemical shift increases.
  4. Hence 1, 1-Difluroethane has protons with highest chemical shift.
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