The method for carrying out a stereospecific conversion of trans,trans − 2 , 4 − hexadiene into cis,trans − 2 , 4 − hexadiene is to be suggested. Concept Introduction: > The compounds that have the same molecular formula of atoms but the structure of the compounds are different for the positions of atoms are called isomers. > In double bond or cyclic compounds, if two same functional groups are present on the same side of the double bond or cyclic compound, the given compound can be labeled as cis. > If the two functional groups are present on the different sides of the double bond or cyclic compound, the given compound can be labeled as Trans. > Cis-trans isomerism exists in the compounds in which similar groups are present on the adjacent carbon atoms. > The electrocyclic reactions are initiated by heat or light and are stereospecific in nature. > The thermal electrocyclic reaction having 4 n Π electron takes place with conrotatory motion. > The photochemical electrocyclic reaction having 4 n Π electron takes place with disrotatory motion.

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Chapter D, Problem 3PP

Interpretation Introduction

Interpretation:

The method for carrying out a stereospecific conversion of trans,trans−2,4−hexadiene into cis,trans−2,4−hexadiene is to be suggested.

Concept Introduction:
>
The compounds that have the same molecular formula of atoms but the structure of the compounds are different for the positions of atoms are called isomers.
>
In double bond or cyclic compounds, if two same functional groups are present on the same side of the double bond or cyclic compound, the given compound can be labeled as cis.
>
If the two functional groups are present on the different sides of the double bond or cyclic compound, the given compound can be labeled as Trans.
>
Cis-trans isomerism exists in the compounds in which similar groups are present on the adjacent carbon atoms.
>
The electrocyclic reactions are initiated by heat or light and are stereospecific in nature.
>
The thermal electrocyclic reaction having 4n Π electron takes place with conrotatory motion.
>
The photochemical electrocyclic reaction having 4n Π electron takes place with disrotatory motion.

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