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Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079

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Section
BuyFindarrow_forward

Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079
Textbook Problem

HOW many alcohol constitutional isomers exist that fit each of the following descriptions?

  1. a. C7 alcohols that are named as heptanols
  2. b. C7 alcohols that are named as dimethylcyclopentanols
  3. c. Alcohols that have the molecular formula C5H12O
  4. d. Saturated alcohols that have the molecular formula C4H8O

(a)

Interpretation Introduction

Interpretation:

The number of alcohol constitutional isomers that exist for C7 alcohols that are named as heptanol has to be given.

Concept Introduction:

Organic compounds are represented shortly by the molecular formula and structural formula.  Each and every compound has its own molecular formula.  Compounds can have same molecular formula but not same structural formula.

Isomers are the compounds that have same molecular formula but different structural formula.  The main difference lies in the way the atoms are arranged in the structure.  Isomers have different chemical and physical properties even when they have same molecular formula.  This is known as Isomerism.

If there is difference only in the connectivity of the atoms in the molecule, then it is known as constitutional isomerism.  The isomers are known as constitutional isomers.  They will have same molecular formula and same functional group, but they differ in the connectivity between the atoms in the molecule.

In case of alcohols, constitutional isomerism is possible for the compounds that contain three or more carbon atoms.

Explanation

Given alcohol is said to contain seven carbon atoms.  The constitutional isomer must have heptanol as the name.  Therefore, the carbon chain has to be in linear form only in order to have the name of alcohol as heptanol.  The difference can be made only in the position of hydroxyl group.  The possible structures can be drawn as shown below,

(b)

Interpretation Introduction

Interpretation:

The number of alcohol constitutional isomers that exist for C7 alcohols that are named as dimethylcyclopentanol has to be given.

Concept Introduction:

Organic compounds are represented shortly by the molecular formula and structural formula.  Each and every compound has its own molecular formula.  Compounds can have same molecular formula but not same structural formula.

Isomers are the compounds that have same molecular formula but different structural formula.  The main difference lies in the way the atoms are arranged in the structure.  Isomers have different chemical and physical properties even when they have same molecular formula.  This is known as Isomerism.

If there is difference only in the connectivity of the atoms in the molecule, then it is known as constitutional isomerism.  The isomers are known as constitutional isomers.  They will have same molecular formula and same functional group, but they differ in the connectivity between the atoms in the molecule.

In case of alcohols, constitutional isomerism is possible for the compounds that contain three or more carbon atoms.

(c)

Interpretation Introduction

Interpretation:

The number of alcohol constitutional isomers that exist for alcohols that have molecular formula as C5H12O has to be given.

Concept Introduction:

Organic compounds are represented shortly by the molecular formula and structural formula.  Each and every compound has its own molecular formula.  Compounds can have same molecular formula but not same structural formula.

Isomers are the compounds that have same molecular formula but different structural formula.  The main difference lies in the way the atoms are arranged in the structure.  Isomers have different chemical and physical properties even when they have same molecular formula.  This is known as Isomerism.

If there is difference only in the connectivity of the atoms in the molecule, then it is known as constitutional isomerism.  The isomers are known as constitutional isomers.  They will have same molecular formula and same functional group, but they differ in the connectivity between the atoms in the molecule.

In case of alcohols, constitutional isomerism is possible for the compounds that contain three or more carbon atoms.

(d)

Interpretation Introduction

Interpretation:

The number of saturated alcohol constitutional isomers that exist for alcohols that have molecular formula as C4H8O has to be given.

Concept Introduction:

Organic compounds are represented shortly by the molecular formula and structural formula.  Each and every compound has its own molecular formula.  Compounds can have same molecular formula but not same structural formula.

Isomers are the compounds that have same molecular formula but different structural formula.  The main difference lies in the way the atoms are arranged in the structure.  Isomers have different chemical and physical properties even when they have same molecular formula.  This is known as Isomerism.

If there is difference only in the connectivity of the atoms in the molecule, then it is known as constitutional isomerism.  The isomers are known as constitutional isomers.  They will have same molecular formula and same functional group, but they differ in the connectivity between the atoms in the molecule.

In case of alcohols, constitutional isomerism is possible for the compounds that contain three or more carbon atoms.

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