File:Amine plus Carboxylic Acid.PNG

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

In your article, replace the image with:

<math chem>\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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