Q56 · CSIR-NET Chemistry, December 2012
Paper: CSIR-NET December 2012 · Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Inorganic Spectroscopy – General · Marks: 2 · Difficulty: Medium
Find out the number of lines in the ${ }^{31} \mathrm{P} \mathrm{NMR}$ signal for diagram 
(a)3
(b)6
(c)18
(d)90
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
³¹P couples to its own H (2), two F (3), two ¹⁵N (3) and four N–H protons (5): 2 × 3 × 3 × 5 = 90 lines (d).
Study loop for Inorganic Spectroscopy