Chapter 6, Problem 6.43P

(a)

Interpretation Introduction

Interpretation:

The reason why heat of hydrogenation for cis isomer is larger than trans isomer has to be indicated.

Concept Introduction:

Hydrogenation: It is the reaction between compounds with unsaturated bonds and within ${\text{H}}_{\text{2}}$ presence of catalyst that results to add hydrogens across the double bonds present in the compound.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

cis isomer: The compound with two functional groups are present on same side of the carbon chain.

Trans isomer: The compound with two functional groups are present on opposite side of the carbon chain.

(b)

Interpretation Introduction

Interpretation:

The ration of trans to cis isomer has to be determined.

Concept Introduction:

Hydrogenation: It is the reaction between compound with unsaturated bonds and with ${\text{H}}_{\text{2}}$ in presence of catalyst that results to add hydrogens across the double bonds present in the compound.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

cis isomer: The compound with two functional groups are present on same side of the carbon chain.

Trans isomer: The compound with two functional groups are present on opposite side of the carbon chain.