Q54 · CSIR NET Chemistry, June 2012
Paper: CSIR NET June 2012 · Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: NMR 13C · Marks: 2 · Difficulty: Medium
The number of signals that appear in the broadband decoupled $^{13}\mathrm{C}$ NMR spectrum of phenanthrene and anthracene, respectively are
(a)ten and four
(b)ten and ten
(c)seven and four
(d)seven and seven.
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Phenanthrene (C₂v) has seven unique carbons; anthracene (D₂h) has four.
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