Q9 · CSIR-NET Chemistry, June 2012

Paper: CSIR-NET June 2012 · Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: NMR 1H · Marks: 2 · Difficulty: Easy

Match the following
Compound$^{13}$C NMR chemical shift ($\delta$ ppm)
(A) Acetic acid(i) 95
(B) Acetonitrile(ii) 115
(C) Acetone(iii) 175
(D) Carbon tetrachloride(iv) 205
(a)(A)-(iii), (B)-(ii), (C)-(iv), (D)-(i)
(b)(A)-(iii), (B)-(iv), (C)-(i), (D)-(ii)
(c)(A)-(i), (B)-(ii), (C)-(iv), (D)-(ii)
(d)(A)-(iii), (B)-(i), (C)-(iii), (D)-(iv)
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
¹³C shifts: acetic acid C=O ≈ 175–178, acetonitrile C≡N ≈ 115–117, acetone C=O ≈ 205, CCl₄ ≈ 96. A–iii, B–ii, C–iv, D–i (a).

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