Give the structure of the product formed when

(a) 3-methylhexanoic acid is heated with a large excess of ethanol (as solvent) with a sulfuric acid catalyst.

(b) Adipic acid (Table 20.1) is heated in a large excess of 1-propanol (as solvent) with a sulfuric acid catalyst.

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TABLE 20.1 Names and Structures of Some Carboxylic Acids Systematic name Common name methanoic acid ethanoic acid propanoic acid butanoic acid 2-methylpropanoic acid pentanoic acid 3-methylbutanoic acid 2,2-dimethylpropanoic acid hexanoic acid octanoic acid decanoic acid dodecanoic acid tetradecanoic acid formic acid acetic acid propionic acid butyric acid isobutyric acid valeric acid isovaleric acid pivalic acid caproic acid caprylic acid capric acid lauric acid myristic acid Structure HCO₂H CH,CO,H CH,CH,CO;H CH,CH,CH,CO,H (CH3),CHCO,H CH₂(CH₂)3CO₂H (CH3),CHCH,CO,H (CH3)3CCO₂H CH₂(CH₂)4CO₂H CHJ(CH,)%CO,H CH3(CH2)gCO;H CH,(CH2)CO,H CH₂(CH₂)2CO₂H