Refer to Figure 14.57 and Table 14.5 to assign chemical shifts for the vinylic protons Ha,...

Refer to Figure 14.57 and Table 14.5 to assign chemical shifts for the vinylic protons H_a, H_b, and H_c in vinyl acetate.

(a)

---

(b)

---

(c)

---

(d)

Figure 14.57 Each of the vinylic protons appears as a doublet of doublets in the 300-MHz ¹H NMR spectrum of vinyl acetate.

Table 14.5 Approximate Values of Proton Coupling Constants (in Hz)*