In problems 4 28 to 4 51, refer to Table 4 3 for isotopic abundances where needed (a) In the 1 H NMR spectrum of compound 4 21, there is a triplet at 3 60 ppm (J 10 4 Hz) Assign the signal and explain the origin of the coupling What would you observe in the 31 P 1 H NMR spectrum of compound 4 21 (b...

Lets tackle the questions in parts a For the 1H NMR spectrum of compound 421 we have a triplet at 360 ppm with a coupling constant J of 104 Hz The pre ...

In problems 4.28 to 4.51, refer to Table 4.3 for isotopic abundances where needed. (a) In the

Question:

In problems 4.28 to 4.51, refer to Table 4.3 for isotopic abundances where needed.

(a) In the ¹H NMR spectrum of compound 4.21, there is a triplet at δ 3.60 ppm (J 10.4 Hz). Assign the signal and explain the origin of the coupling. What would you observe in the ³¹P{¹H} NMR spectrum of compound 4.21?

(b) Figure 4.40 shows the solid state structure of a phosphorus-containing cation. The ³¹P NMR spectrum of a CDCl₃ solution of the [CF₃SO₃]^– salt was recorded. How many signals (ignore spin–spin coupling) would you expect to see in the spectrum, assuming that the solid state structure is retained in solution?

Figure 4.40