Chapter 17.1, Problem 17.1P

Draw out each compound to clearly show what groups are bonded to the carbonyl carbon. Label each compound as a carboxylic acid, ester, or amide.
a. ${\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}{\text{CO}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}$
b. ${\text{CH}}_{\text{3}}{\text{CONHCH}}_{\text{3}}$
c. ${\left({\text{CH}}_{\text{3}}\right)}_{\text{3}}{\text{CCO}}_{\text{2}}\text{H}$
d. ${\left({\text{CH}}_{\text{3}}\right)}_{\text{2}}\text{CHCON}{\left({\text{CH}}_{\text{3}}\right)}_{\text{2}}$