Q28 · CSIR NET Chemistry, June 2021

Paper: CSIR NET June 2021 · Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: NMR 13C · Marks: 2 · Difficulty: Medium

Which of the patterns (A, B, C or D) fits best with the $^{13}\mathrm{C}$ NMR spectrum of $\mathrm{TiCl_3(CDH_2)}$, [Given: $J^{1}_{(\mathrm{C-H})} > J^{1}_{(\mathrm{C-D})}$]
Answer
Answer (as printed): B

The options are missing from the source scan for this question, so there is nothing here for this letter to point at. The letter is what the book printed.

Explanation
¹³C is split by two H (large ¹J) into a 1:2:1 triplet, and each line again by one D (I = 1) into a 1:1:1 triplet. That gives three groups of three lines, the central group twice as intense (b).

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