Chapter 23.3, Problem 23.2E

(a)

Interpretation Introduction

Interpretation:

Geometric isomers are possible or not for the given structural formulas has to be decided.

Concept Introduction:

Geometric isomers are the isomers of same compound which differ in the relative positions the atoms occupy in space.  For alkene geometric isomers are possible if the carbon atoms in the end of the double bond are not bonded to same groups or atoms.  Usually trans isomer is more stable than cis isomer as the steric hindrance will be very less.

To decide: Whether cis-trans isomer possibility is there for the given structural formulas.

(b)

Interpretation Introduction

Interpretation:

Geometric isomers are possible or not for the given structural formulas has to be decided.

Concept Introduction:

Geometric isomers are the isomers of same compound which differ in the relative positions the atoms occupy in space.  For alkene geometric isomers are possible if the carbon atoms in the end of the double bond are not bonded to same groups or atoms.  Usually trans isomer is more stable than cis isomer as the steric hindrance will be very less.

To decide: Whether cis-trans isomer possibility is there for the given structural formulas.