Name: Date: Which proton(s) of the compound below would appear as a septet in th

Question

Name: Date: Which proton(s) of the compound below would appear as a septet in the 'H NMR spectrum? 1. CH3C2CH2-0-CH A) The protons on carbon I B) The proton on carbon II C) The protons on carbon III D) The protons on carbon IV E) The protons on carbon V 2. How many signals would you expect to find in the 'H NMR spectrum of CH,OCH CH2OCH,? A) 1 B) 2 C) 3 D) 4 E) 5 3. Predict the splitting pattern you would observe for the proton at C3 of 2,3-dimethyl-2- phenylbutane. A) Doublet B) Singlet C) Quartet D) Septet E) Octet 4. How many 'H NMR signals would trans-1,2-dichlorocyclopropane give? A) 1 B) 2 C) 3 D) 4 E) 5 Page 1

Explanation / Answer

1) The proton on carbon 2 gives a septet.

Explanation: multiplicity of a proton is indicated by n+1 rule. where, n = number of protons attached to adjacent carbon. n+1 = 6+1 = 7.

2) The number of types of protons are 2 so the number of signals in H-NMR are 2.

3) option D is correct

Explanation: multiplicity of a proton is indicated by n+1 rule. where, n = number of protons attached to adjacent carbon. n+1 = 6+1 = 7.

4) The number of signals in 1H-NMR of trans1,2-dichlorocyclopropane are 2. option B is correct.

5) option C is correct. The number of types of protons in this structure are 3 so the number of signals are 3.

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.