Q54 · CSIR-NET Chemistry, December 2017
Paper: CSIR-NET December 2017 · Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: NMR 1H · Marks: 2 · Difficulty: Hard
The correct match of the circled protons in Column P with ${ }^{1} \mathrm{H}$ NMR chemical shift ($\delta$ ppm) in Column Q is P Q I 
A. 6.72 II III 
B. 16.4 C. -0.61
A. 6.72 II III B. 16.4 C. -0.61(a)I-A; II-B; III-C
(b)I-B; II-A; III-C
(c)I-B; II-C; III-A
(d)I-C; II-B; III-A
Answer
Answer: B ✓ checked by 4AB · confidence medium
Explanation
The inner H of the paratropic dehydroannulene I is at δ 16.4. The quinone vinyl H (II) is at 6.72. The inner H of the diatropic annulene III is at −0.61. I-B, II-A, III-C (b).
Study loop for Organic Spectroscopy