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Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079

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Chapter
Section
BuyFindarrow_forward

Organic And Biological Chemistry

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

Assign an IUPAC name to each of the following unsaturated hydrocarbons.

Chapter 2, Problem 2.90EP, Assign an IUPAC name to each of the following unsaturated hydrocarbons. , example  1

Chapter 2, Problem 2.90EP, Assign an IUPAC name to each of the following unsaturated hydrocarbons. , example  2

Chapter 2, Problem 2.90EP, Assign an IUPAC name to each of the following unsaturated hydrocarbons. , example  3

Chapter 2, Problem 2.90EP, Assign an IUPAC name to each of the following unsaturated hydrocarbons. , example  4

(a)

Interpretation Introduction

Interpretation:

The IUPAC name for the given unsaturated hydrocarbon has to be assigned.

Concept Introduction:

IUPAC nomenclature for alkyne:

  • The suffix –ane has to be replaced with the suffix –yne. This is used to indicate the presence of triple bond.
  • The longest continuous chain of carbon atoms has to be chosen that contains both carbon atoms of the triple bond.
  • The parent carbon chain has to be numbered in a way so that the numbering begins at the end near to the triple bond. In case if the triple bond is equidistant from both ends, then numbering has to be done from the end that is closer to substituents.
  • The position of the triple bond has to be given a single number which is lower‑numbered carbon atom that is present in the triple bond.
  • Suffixes like –diyne, -triyne, -tetryne, and so on are used when the compound contains more than one triple bond.
Explanation

Given structure of unsaturated hydrocarbon is,

The parent carbon chain is found to contain four carbon atoms. Therefore, the parent carbon is butane.

As a triple bond is present in the parent carbon chain, the suffix –ane is replaced by –yne.

Numbering has to be given so that the triple bond gets the least numbering...

(b)

Interpretation Introduction

Interpretation:

The IUPAC name for the given unsaturated hydrocarbon has to be assigned.

Concept Introduction:

IUPAC nomenclature for alkyne:

  • The suffix –ane has to be replaced with the suffix –yne. This is used to indicate the presence of triple bond.
  • The longest continuous chain of carbon atoms has to be chosen that contains both carbon atoms of the triple bond.
  • The parent carbon chain has to be numbered in a way so that the numbering begins at the end near to the triple bond. In case if the triple bond is equidistant from both ends, then numbering has to be done from the end that is closer to substituents.
  • The position of the triple bond has to be given a single number which is lower‑numbered carbon atom that is present in the triple bond.
  • Suffixes like –diyne, -triyne, -tetryne, and so on are used when the compound contains more than one triple bond.

(c)

Interpretation Introduction

Interpretation:

The IUPAC name for the given unsaturated hydrocarbon has to be assigned.

Concept Introduction:

IUPAC nomenclature for alkyne:

  • The suffix –ane has to be replaced with the suffix –yne. This is used to indicate the presence of triple bond.
  • The longest continuous chain of carbon atoms has to be chosen that contains both carbon atoms of the triple bond.
  • The parent carbon chain has to be numbered in a way so that the numbering begins at the end near to the triple bond. In case if the triple bond is equidistant from both ends, then numbering has to be done from the end that is closer to substituents.
  • The position of the triple bond has to be given a single number which is lower‑numbered carbon atom that is present in the triple bond.
  • Suffixes like –diyne, -triyne, -tetryne, and so on are used when the compound contains more than one triple bond.

(d)

Interpretation Introduction

Interpretation:

The IUPAC name for the given unsaturated hydrocarbon has to be assigned.

Concept Introduction:

IUPAC nomenclature for alkyne:

  • The suffix –ane has to be replaced with the suffix –yne. This is used to indicate the presence of triple bond.
  • The longest continuous chain of carbon atoms has to be chosen that contains both carbon atoms of the triple bond.
  • The parent carbon chain has to be numbered in a way so that the numbering begins at the end near to the triple bond. In case if the triple bond is equidistant from both ends, then numbering has to be done from the end that is closer to substituents.
  • The position of the triple bond has to be given a single number which is lower‑numbered carbon atom that is present in the triple bond.
  • Suffixes like –diyne, -triyne, -tetryne, and so on are used when the compound contains more than one triple bond.

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