Q40 · CSIR NET Chemistry, December 2017
Paper: CSIR NET December 2017 · Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Inorganic Spectroscopy – General · Marks: 2 · Difficulty: Medium
Assuming $^{1}J_{\mathrm{PH}} > J_{\mathrm{PB}}$ the expected $^{31}\mathrm{P}$ NMR spectrum of $\mathrm{H_3P.{}^{11}BCl_3}$ [for $^{11}\mathrm{B}$, I = 3/2] is
(a)
(b)
(c)
(d)
Answer
Answer: C ✓ checked by 4AB · confidence medium
Explanation
³¹P couples to three ¹H (large ¹J) to give a 1:3:3:1 quartet. Each line is split again by ¹¹B (I = 3/2) into four equal lines: a quartet of 1:1:1:1 quartets (c).
Study loop for Inorganic Spectroscopy