The ${ }^{19} \mathrm{F}$ NMR spectrum of $\mathrm{ClF}_{3}$ when measured at $-60^{\circ} \mathrm{C}$ will be observed as a
(a)singlet
(b)doublet
(c)doublet and triplet
(d)doublet of doublet and a doublet of triplet
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
At −60 °C exchange is frozen: the two equivalent axial F couple to the equatorial F (a doublet, 2F) and the equatorial F couples to the two axial F (a triplet, 1F).