A phosphate monoester group, a phosphorus anhydride linkage, two amide groups and the acetyl group has to be identified from the given structure of acetyl coenzyme A. Concept Introduction: Phosphoric Acid: It is an inorganic acid having similarities with a carboxylic acid . There are three different acidic hydrogens which causes it to form three anions. Phosphate Ester: Phosphate esters are prepared by the reaction of a phosphoric acid and an alcohol molecule with the elimination of water molecule. Alcohol can react with one − O H group forming Phosphate monoester . Alcohol can react with two − O H groups of phosphoric acid forming Phosphate diester. Alcohol can react with three − O H groups of phosphoric acid forming Phosphate triester. Amide: One − N H 2 , − N H R ' or − N R ' 2 group is attached to the carbonyl carbon atom of the compound. It is represented as R C O N R ' 2 . Phosphoric Acid Anhydride: It is formed when two phosphoric acid molecules react with the elimination of water molecule. It has atleast one P − O − P anhydride linkage. Esters containing one P − O − P anhydride bond are known as diphosphates whereas two P − O − P anhydride bond are known as triphosphates.

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Chapter 17.6, Problem 17.29P

Interpretation Introduction

Interpretation:

A phosphate monoester group, a phosphorus anhydride linkage, two amide groups and the acetyl group has to be identified from the given structure of acetyl coenzyme A.

Concept Introduction:

Phosphoric Acid: It is an inorganic acid having similarities with a carboxylic acid. There are three different acidic hydrogens which causes it to form three anions.

Phosphate Ester: Phosphate esters are prepared by the reaction of a phosphoric acid and an alcohol molecule with the elimination of water molecule.

Alcohol can react with one −OH group forming Phosphate monoester.

Alcohol can react with two −OH groups of phosphoric acid forming Phosphate diester.

Alcohol can react with three −OH groups of phosphoric acid forming Phosphate triester.

Amide: One −NH2, −NHR' or −NR'2 group is attached to the carbonyl carbon atom of the compound. It is represented as RCONR'2.

Phosphoric Acid Anhydride: It is formed when two phosphoric acid molecules react with the elimination of water molecule. It has atleast one P−O−P anhydride linkage. Esters containing one P−O−P anhydride bond are known as diphosphates whereas two P−O−P anhydride bond are known as triphosphates.

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