ABC26OR0122 · Organic Spectroscopy

Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: NMR 1H · Exam: CSIR-NET JUNE 2012 · 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 (as printed): A

Explanation

In 13C NMR: 0-50 ppm: C-C single bond 50-100 ppm: C-X (X: O, N, S, and halogen) 100-150 ppm: C=C double bonded carbons 150-200 ppm: C=O (carbon double bonded to electronegative atom)

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