Compound B is isomeric with A (Problem 19 63) and shows an IR peak at 1715 cm1 The 1H NMR spectrum of B has peaks at 2 4 (1 H, septet, J 7 Hz), 2 1 (3 H, singlet), and 1 2 (6 H, doublet, J 7Hz) What is the structure of B

Question: Compound B is isomeric with A (Problem 19.63) and shows an IR peak at 1715 cm1. The 1H NMR spectrum of B has peaks at

Compound B is isomeric with A (Problem 19.63) and shows an IR peak at 1715 cm–1. The 1H NMR spectrum of B has peaks at 2.4 δ (1 H, septet, J = 7 Hz), 2.1 δ (3 H, singlet), and 1.2 δ (6 H, doublet, J = 7Hz). What is the structure of B?

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