Chapter 7.4, Problem 9P

Interpretation Introduction

a) CH₃CH=CH₂

Interpretation:

Can CH₃CH=CH₂ exist as pairs of cis-trans isomer is to be stated. If so, the structures of cis-trans pair are to be drawn indicating their geometry.

Concept introduction:

The lack of rotation around carbon-carbon double bonds leads to cis-trans isomerism. The requirement is that both the carbons in double bond should be bonded to different substituents. Compounds that have one of their doubly bonded carbons bonded to identical substituents cannot exist as cis-trans isomers.

To change:

Whether CH₃CH=CH₂ can exist as a pair of cis-trans isomers and to draw their structures with the geometry.

Interpretation Introduction

b) (CH₃)₂C=CHCH₃

Interpretation:

Can (CH₃)₂C=CHCH₃ exist as pairs of cis-trans isomer is to be stated. If so, the structures of cis-trans pair are to be drawn indicating their geometry.

Concept introduction:

The lack of rotation around carbon-carbon double bonds leads to cis-trans isomerism. The requirement is that both the carbons in double bond should be bonded to different substituents. Compounds that have one of their doubly bonded carbons bonded to identical substituents cannot exist as cis-trans isomers.

To change:

Whether (CH₃)₂C=CHCH₃ can exist as a pair of cis-trans isomers and to draw their structures with the geometry.

Interpretation Introduction

c) CH₃CH₂CH=CHCH₃

Interpretation:

Can CH₃CH₂CH=CHCH₃ exist as pairs of cis-trans isomer is to be stated. If so, the structures of cis-trans pair are to be drawn indicating their geometry.

Concept introduction:

The lack of rotation around carbon-carbon double bonds leads to cis-trans isomerism. The requirement is that both the carbons in double bond should be bonded to different substituents. Compounds that have one of their doubly bonded carbons bonded to identical substituents cannot exist as cis-trans isomers.

To state:

Whether CH₃CH₂CH=CHCH₃ can exist as a pair of cis-trans isomers and to draw their structures with the geometry.

Interpretation Introduction

d) (CH₃)₂C=C(CH₃)CH₂CH₃

Interpretation:

Can (CH₃)₂C=C(CH₃)CH₂CH₃ exist as pairs of cis-trans isomer is to be stated. If so, the structures of cis-trans pair are to be drawn indicating their geometry.

Concept introduction:

The lack of rotation around carbon-carbon double bonds leads to cis-trans isomerism. The requirement is that both the carbons in double bond should be bonded to different substituents. Compounds that have one of their doubly bonded carbons bonded to identical substituents cannot exist as cis-trans isomers.

To state:

Whether (CH₃)₂C=C(CH₃)CH₂CH₃ can exist as a pair of cis-trans isomers and to draw their structures with the geometry.

Interpretation Introduction

e) ClCH=CHCl

Interpretation:

Can ClCH=CHCl exist as pairs of cis-trans isomer is to be stated. If so, the structures of cis-trans pair are to be drawn indicating their geometry.

Concept introduction:

The lack of rotation around carbon-carbon double bonds leads to cis-trans isomerism. The requirement is that both the carbons in double bond should be bonded to different substituents. Compounds that have one of their doubly bonded carbons bonded to identical substituents cannot exist as cis-trans isomers.

To state:

Whether ClCH=CHCl can exist as a pair of cis-trans isomers and to draw their structures with the geometry.

Interpretation Introduction

f) BrCH=CHCl

Interpretation:

Can BrCH=CHCl exist as pairs of cis-trans isomer is to be stated. If so, the structures of cis-trans pair are to be drawn indicating their geometry.

Concept introduction:

The lack of rotation around carbon-carbon double bonds leads to cis-trans isomerism. The requirement is that both the carbons in double bond should be bonded to different substituents. Compounds that have one of their doubly bonded carbons bonded to identical substituents cannot exist as cis-trans isomers.

To state:

Whether BrCH=CHCl can exist as a pair of cis-trans isomers and to draw their structures with the geometry.