In the ¹⁹ F NMR spectrum of PF₅, the number of signals and multiplicity, at room temperature are · ABC26IN1156
Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Inorganic Spectroscopy – General · Exam: CSIR NET DEC 2011 · Marks: 2 · Difficulty: Medium
In the ${ }^{19} \mathrm{F} \mathrm{NMR}$ spectrum of $\mathrm{PF}_{5}$, the number of signals and multiplicity, at room temperature are
(a)One, singlet
(b)One, doublet
(c)Two, doublet
(d)Two, singlet
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
PF₅ undergoes fast Berry pseudorotation at room temperature, so all five F are equivalent: one signal, split into a doublet by ³¹P.
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