${\displaystyle {\mathsf {{\ce {\underbrace {H-\!\!{\overset {\displaystyle R1 \atop |}{\underset {| \atop \displaystyle R2}{N}}}\!\!\!\!:} _{{primary\ or \atop secondary} \atop amine}}}+\underbrace {\ce {R3X}} _{{\text{halogeno-}} \atop {\text{alkane}}}{\ce {->}}\underbrace {\ce {:\!\!\!\!{\overset {\displaystyle R1 \atop |}{\underset {| \atop \displaystyle R2}{N}}}\!\!-R3}} _{\begin{matrix}{{{\text{alkyl-}} \atop {\text{substituted}}} \atop {\text{amine}}}\\{\ce {(secondary \atop or\ tertiary)}}\end{matrix}}+{\ce {\underbrace {HX} _{halogen \atop acid}}}}}}$

Вики-код для замены:

<math chem>\mathsf{\ce{\underbrace{H-\!\!\overset{\displaystyle R1 \atop | }{\underset{ | \atop \displaystyle R2}{N} }\!\!\!\!:}_{{primary\ or \atop secondary}\atop amine}}

+ \underbrace\ce{R3X}_{\text{halogeno-}\atop\text{alkane} } \ce{->} \underbrace\ce{:\!\!\!\!\overset{\displaystyle R1 \atop | }{\underset{ | \atop \displaystyle R2}{N} }\!\!-R3} _{\begin{matrix} { {\text{alkyl-}\atop \text{substituted} } \atop \text{amine} } \\ \ce{(secondary \atop or\ tertiary)} \end{matrix} } + \ce{\underbrace{HX}_{halogen\atop acid} }}</math>

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