${\displaystyle {\mathsf {{\ce {\underbrace {H-\!\!{\overset {\displaystyle R1 \atop |}{\underset {| \atop \displaystyle R2}{N}}}\!\!\!\!:} _{amine}+\underbrace {R3-{\overset {\displaystyle O \atop \|}{C}}-OH} _{carboxylic \atop acid}->}}\ \underbrace {\ce {{H-{\overset {\displaystyle R1 \atop |}{\underset {| \atop \displaystyle R2}{N+}}}-H}+R3-COO^{-}}} _{{\text{substituted-ammonium}} \atop {\text{carboxylate salt}}}{\ce {->[{\ce {heat}}][{\ce {dehydration}}]\underbrace {{\overset {\displaystyle R1 \atop |}{\underset {| \atop \displaystyle R2}{N}}}\!\!-{\overset {\displaystyle O \atop \|}{C}}-R3} _{amide}+\underbrace {H2O} _{water}}}}}}$

Вики-код для замены:

<math chem>\mathsf{\ce{

\underbrace{H-\!\!\overset{\displaystyle R1 \atop | }{\underset{ | \atop \displaystyle R2}N}\!\!\!\!:}_{amine} + \underbrace{R3-\overset{\displaystyle O \atop \| }C-OH}_{carboxylic \atop acid} -> }\ \underbrace\ce{{H-\overset{\displaystyle R1 \atop | }{\underset{ | \atop \displaystyle R2}{N+}}-H} + R3-COO^-} _{\text{substituted-ammonium} \atop \text{carboxylate salt} } \ce{->[\ce{heat}][\ce{dehydration}] \underbrace{\overset{\displaystyle R1 \atop | }{\underset{ | \atop \displaystyle R2}N}\!\!-\overset{\displaystyle O \atop \| }C-R3}_{amide} + \underbrace{H2O}_{water} }}</math>

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