The number of signals that appear in the broadband decoupled ¹³ C NMR spectrum of phenanthrene and anthracene, respectively are

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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