CARBOXYLIC ACIDS
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ALDEHYDES, KETONES AND CARBOXYLIC ACID

28373 Select the final product from this sequence of reactions.Acetoacetic ester \(\xrightarrow{NaOEt}\)  \(\xrightarrow{C{{H}_{3}}I}\)  \(\xrightarrow{NaOEt}\)   \(\xrightarrow{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br}\)

1 $\begin{matrix}
   O\,\,\,\,\,\,\,C{{H}_{3}}\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C-COO{{C}_{2}}{{H}_{5}}  \\
   \,\,\,\,|\,\,\,\,\,\,\,\,\,  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
2 $\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
3 $\begin{matrix}
   H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
4 $\begin{matrix}
   \,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}CO-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   \,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}$
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28375 \(CH_2(CO_2Me)_2 +?  \xrightarrow[(ii)\,AcOH]{(i)\,Na}  CH(CO_2Me)_3\)Which of the following reactants will complete the above reaction ?

1 \(CH_2(CO_2Me)_2\)
2 \((CO_2Me)_2\)
3 \(Cl -CO_2Me\)
4 \(COCl_2\)
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28376 Choose the best sequence of reactions for transformation given . Semicolons  indicate separate reaction steps to be used in the order shown.

1 \(H_3O^+\) ;  \(SOCl_2\) ;  \(CH_3NH_2\)
2 \(HO^-/H_2O\);  \(PBr_3\) ;  \(Mg\) ;  \(CO_2\);  \(H_3O^-\);  \(SOCl_2\);  \(C H_3NH_2\)
3 \(LiAlH_4\) ;  \(H_2O \);  \(HBr\);  \(Mg\);  \(CO_2\);  \(H_3O^+\);  \(SOCl_2\) ;  \(CH_3NH_2\)
4 None of these would yield the desired product
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28377 A key step in the hydrolysis of acetamide in aqueous acid proceeds by  nucleophilic addition of

1 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}{{O}^{+}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
2 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{2}}O\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
3 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}{{O}^{+}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
4 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   H{{O}^{-}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
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ALDEHYDES, KETONES AND CARBOXYLIC ACID

28373 Select the final product from this sequence of reactions.Acetoacetic ester \(\xrightarrow{NaOEt}\)  \(\xrightarrow{C{{H}_{3}}I}\)  \(\xrightarrow{NaOEt}\)   \(\xrightarrow{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br}\)

1 $\begin{matrix}
   O\,\,\,\,\,\,\,C{{H}_{3}}\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C-COO{{C}_{2}}{{H}_{5}}  \\
   \,\,\,\,|\,\,\,\,\,\,\,\,\,  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
2 $\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
3 $\begin{matrix}
   H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
4 $\begin{matrix}
   \,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}CO-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   \,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}$
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28375 \(CH_2(CO_2Me)_2 +?  \xrightarrow[(ii)\,AcOH]{(i)\,Na}  CH(CO_2Me)_3\)Which of the following reactants will complete the above reaction ?

1 \(CH_2(CO_2Me)_2\)
2 \((CO_2Me)_2\)
3 \(Cl -CO_2Me\)
4 \(COCl_2\)
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28376 Choose the best sequence of reactions for transformation given . Semicolons  indicate separate reaction steps to be used in the order shown.

1 \(H_3O^+\) ;  \(SOCl_2\) ;  \(CH_3NH_2\)
2 \(HO^-/H_2O\);  \(PBr_3\) ;  \(Mg\) ;  \(CO_2\);  \(H_3O^-\);  \(SOCl_2\);  \(C H_3NH_2\)
3 \(LiAlH_4\) ;  \(H_2O \);  \(HBr\);  \(Mg\);  \(CO_2\);  \(H_3O^+\);  \(SOCl_2\) ;  \(CH_3NH_2\)
4 None of these would yield the desired product
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28377 A key step in the hydrolysis of acetamide in aqueous acid proceeds by  nucleophilic addition of

1 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}{{O}^{+}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
2 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{2}}O\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
3 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}{{O}^{+}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
4 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   H{{O}^{-}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
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ALDEHYDES, KETONES AND CARBOXYLIC ACID

28373 Select the final product from this sequence of reactions.Acetoacetic ester \(\xrightarrow{NaOEt}\)  \(\xrightarrow{C{{H}_{3}}I}\)  \(\xrightarrow{NaOEt}\)   \(\xrightarrow{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br}\)

1 $\begin{matrix}
   O\,\,\,\,\,\,\,C{{H}_{3}}\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C-COO{{C}_{2}}{{H}_{5}}  \\
   \,\,\,\,|\,\,\,\,\,\,\,\,\,  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
2 $\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
3 $\begin{matrix}
   H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
4 $\begin{matrix}
   \,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}CO-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   \,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}$
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28375 \(CH_2(CO_2Me)_2 +?  \xrightarrow[(ii)\,AcOH]{(i)\,Na}  CH(CO_2Me)_3\)Which of the following reactants will complete the above reaction ?

1 \(CH_2(CO_2Me)_2\)
2 \((CO_2Me)_2\)
3 \(Cl -CO_2Me\)
4 \(COCl_2\)
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28376 Choose the best sequence of reactions for transformation given . Semicolons  indicate separate reaction steps to be used in the order shown.

1 \(H_3O^+\) ;  \(SOCl_2\) ;  \(CH_3NH_2\)
2 \(HO^-/H_2O\);  \(PBr_3\) ;  \(Mg\) ;  \(CO_2\);  \(H_3O^-\);  \(SOCl_2\);  \(C H_3NH_2\)
3 \(LiAlH_4\) ;  \(H_2O \);  \(HBr\);  \(Mg\);  \(CO_2\);  \(H_3O^+\);  \(SOCl_2\) ;  \(CH_3NH_2\)
4 None of these would yield the desired product
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28377 A key step in the hydrolysis of acetamide in aqueous acid proceeds by  nucleophilic addition of

1 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}{{O}^{+}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
2 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{2}}O\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
3 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}{{O}^{+}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
4 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   H{{O}^{-}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
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ALDEHYDES, KETONES AND CARBOXYLIC ACID

28373 Select the final product from this sequence of reactions.Acetoacetic ester \(\xrightarrow{NaOEt}\)  \(\xrightarrow{C{{H}_{3}}I}\)  \(\xrightarrow{NaOEt}\)   \(\xrightarrow{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br}\)

1 $\begin{matrix}
   O\,\,\,\,\,\,\,C{{H}_{3}}\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C-COO{{C}_{2}}{{H}_{5}}  \\
   \,\,\,\,|\,\,\,\,\,\,\,\,\,  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
2 $\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
3 $\begin{matrix}
   H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}  \\
\end{matrix}$
4 $\begin{matrix}
   \,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}CO-C-C{{H}_{2}}COO{{C}_{2}}{{H}_{5}}  \\
   \,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,\,C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}$
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28375 \(CH_2(CO_2Me)_2 +?  \xrightarrow[(ii)\,AcOH]{(i)\,Na}  CH(CO_2Me)_3\)Which of the following reactants will complete the above reaction ?

1 \(CH_2(CO_2Me)_2\)
2 \((CO_2Me)_2\)
3 \(Cl -CO_2Me\)
4 \(COCl_2\)
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28376 Choose the best sequence of reactions for transformation given . Semicolons  indicate separate reaction steps to be used in the order shown.

1 \(H_3O^+\) ;  \(SOCl_2\) ;  \(CH_3NH_2\)
2 \(HO^-/H_2O\);  \(PBr_3\) ;  \(Mg\) ;  \(CO_2\);  \(H_3O^-\);  \(SOCl_2\);  \(C H_3NH_2\)
3 \(LiAlH_4\) ;  \(H_2O \);  \(HBr\);  \(Mg\);  \(CO_2\);  \(H_3O^+\);  \(SOCl_2\) ;  \(CH_3NH_2\)
4 None of these would yield the desired product
ALDEHYDES, KETONES AND CARBOXYLIC ACID

28377 A key step in the hydrolysis of acetamide in aqueous acid proceeds by  nucleophilic addition of

1 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}{{O}^{+}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
2 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{2}}O\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
3 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}{{O}^{+}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
4 $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{\,}^{+}}OH  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   H{{O}^{-}}\,\,to\,\,C{{H}_{3}}\,C\,N{{H}_{2}}  \\
\end{matrix}$
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