Write the structure of the ester formed in each of the following reactions:(a) (b) Sample...

Write the structure of the ester formed in each of the following reactions:

(a)

(b)

Sample Solution (a) By analogy to the general equation and to the examples cited in this section, we can write the equation

As actually carried out in the laboratory, 3 mol of propanoic acid was used per mole of 1-butanol, and the desired ester was obtained in 78% yield.