The structural formulas for the cis and trans isomers of hydrindane has to be drawn in its most stable conformation and among the two drawn isomers, the more stable isomer has to be given. Concept Introduction: Cis, Trans Isomerism in Cycloalkanes: When a cycloalkane ring has substituents on two or more carbon atoms, then the cycloalkane ring show a type of stereoisomerism called cis, trans isomerism. Cis, trans isomers have same molecular formula and same connectivity of their atoms, but the arrangement of atoms in space would be different which be interconverted by rotation about single bonds. In cis isomer, the substituents are on the same side of the ring. In trans isomer, the substituents are on the opposite sides of the ring. Bicycloalkane: Bicycloalkanes are cycloalkane with two rings that are shared by two carbon atoms. The shared carbon atoms are called bridgehead carbons and the carbon chain connecting them is called a bridge.

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Chapter 2, Problem 2.38P

Interpretation Introduction

Interpretation:

The structural formulas for the cis and trans isomers of hydrindane has to be drawn in its most stable conformation and among the two drawn isomers, the more stable isomer has to be given.

Concept Introduction:

Cis, Trans Isomerism in Cycloalkanes:

When a cycloalkane ring has substituents on two or more carbon atoms, then the cycloalkane ring show a type of stereoisomerism called cis, trans isomerism.

Cis, trans isomers have same molecular formula and same connectivity of their atoms, but the arrangement of atoms in space would be different which be interconverted by rotation about single bonds.

In cis isomer, the substituents are on the same side of the ring.

In trans isomer, the substituents are on the opposite sides of the ring.

Bicycloalkane:

Bicycloalkanes are cycloalkane with two rings that are shared by two carbon atoms. The shared carbon atoms are called bridgehead carbons and the carbon chain connecting them is called a bridge.

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