Chapter 17, Problem 27P

Interpretation Introduction

(a)

Interpretation:

The structure of carboxylic acid molecular formula ${\text{C}}_{\text{8}}{\text{H}}_{\text{16}}{\text{O}}_{\text{2}}$ that contains six carbons in its longest chain should be drawn.

Concept Introduction:

The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols. The structural formula represents all the bonded atoms with chemical bonds and the arrangement of atoms in the molecule. The compounds with same molecular formula and different structural formula are known as isomers. Isomers can be classified as constitutional isomers and stereoisomers.

Answer to Problem 27P

  

Explanation of Solution

The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols whereas the structural formula represents the arrangement of all the bonded atoms in the molecule.

The carboxylic acid molecular formula ${\text{C}}_{\text{8}}{\text{H}}_{\text{16}}{\text{O}}_{\text{2}}$ and has six carbons in its longest chain must have hex root word with two methyl groups as alkyl groups bonded on parent chain and −COOH group at one terminal of the parent chain.

  

Interpretation Introduction

(b)

Interpretation:

The structure of ester molecular formula ${\text{C}}_6{\text{H}}_{\text{11}}{\text{O}}_{\text{2}}$ containing a methoxy group bonded to the carbonyl group should be drawn.

Concept Introduction:

The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols. The structural formula represents all the bonded atoms with chemical bonds and the arrangement of atoms in the molecule. The compounds with same molecular formula and different structural formula are known as isomers. Isomers can be classified as constitutional isomers and stereoisomers.

Answer to Problem 27P

  

Explanation of Solution

The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols whereas the structural formula represents the arrangement of all the bonded atoms in the molecule.

The ester molecular formula ${\text{C}}_6{\text{H}}_{\text{11}}{\text{O}}_{\text{2}}$ with one methoxy group bonded to >C=O group must be methyl pentanoate as there must be 6 C atoms and one -OCH₃ group in the ester.

  

Interpretation Introduction

(c)

Interpretation:

The structure of ester having molecular formula ${\text{C}}_6{\text{H}}_{\text{10}}{\text{O}}_{\text{2}}$ that contains a ring should be drawn.

Concept Introduction:

The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols. The structural formula represents all the bonded atoms with chemical bonds and the arrangement of atoms in the molecule. The compounds with same molecular formula and different structural formula are known as isomers. Isomers can be classified as constitutional isomers and stereoisomers.

Answer to Problem 27P

  

Explanation of Solution

The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols whereas the structural formula represents the arrangement of all the bonded atoms in the molecule.

The ester molecular formula ${\text{C}}_6{\text{H}}_{\text{10}}{\text{O}}_{\text{2}}$ with one ring must be 3,4-dimethyloxolan-2-one. It has one −COO- link with a five member ring and two methyl groups.