For the given Glycine molecule structural formula has to be written for its zwitterion form. Concept Introduction: Many amino acids are linked together through amide bonds to form a biologically large molecule known to be proteins. Amino functional group is ( − N H 2 ) and carboxyl functional group is ( − C O O H ) and a R (alkyl) group is considered as side chain, all these are bonded to same carbon atom. Zwitterion has both positive as well as negative charge, it is also called neutral dipolar ion. Zwitterion accepts proton in acidic condition and in basic condition zwitterion lose its proton. At low p H , amine and carboxylic acid are protonated and at high p H amine and carboxylic acid are deprotonated.

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Chapter 14.6, Problem 14.16CE

(a)

Interpretation Introduction

Interpretation:

For the given Glycine molecule structural formula has to be written for its zwitterion form.

Concept Introduction:

Many amino acids are linked together through amide bonds to form a biologically large molecule known to be proteins.

Amino functional group is (−NH2) and carboxyl functional group is (−COOH) and a R(alkyl) group is considered as side chain, all these are bonded to same carbon atom.

Zwitterion has both positive as well as negative charge, it is also called neutral dipolar ion.

Zwitterion accepts proton in acidic condition and in basic condition zwitterion lose its proton.

At low pH, amine and carboxylic acid are protonated and at high pH amine and carboxylic acid are deprotonated.

(b)

Interpretation Introduction

Interpretation:

Structural formula of glycine molecule at low pH of 2 and at high pH of 10 has to be drawn.

Concept Introduction:

Many amino acids are linked together through amide bonds to form a biologically large molecule known to be proteins.

Amino functional group is (−NH2) and carboxyl functional group is (−COOH) and a R group is considered as side chain, all these are bonded to same carbon atom.

Zwitterion has both positive as well as negative charge, thus it is also called neutral dipolar ion.

Zwitterion accepts proton in acidic condition and in basic condition zwitterion lose electrons.

At low pH, amine and carboxylic acid are protonated and at high pH amine and carboxylic acid are deprotonated

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