An organic compound A(C13 H23 Cl) exists as distereomers and decolourise bromine water. A on tre

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An organic compound A(C13 H23 Cl) exists as distereomers and...

An organic compound $\mathrm{A}\left(\mathrm{C}_{13} \mathrm{H}_{23} \mathrm{Cl}\right)$ exists as distereomers and decolourise bromine water. A on treatment with ethanolic solution of KOH produces isomeric $\mathrm{B}$ and $\mathrm{C}$ with their molecular formula $\mathrm{C}_{13} \mathrm{H}_{22} .$ Treatment of either $\mathrm{B}$ or $\mathrm{C}$ with Rany Nickel produces 4-isopropyl-1-tertiarybutyl cyclohexane. A on oxidative ozonolysis gives acetone as one product. Identify $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ considering $\mathrm{C}$ to be enantiomeric. According to the information given in the above paragraph compound (B) will be

An organic compound $\mathrm{A}\left(\mathrm{C}_{13} \mathrm{H}_{23} \mathrm{Cl}\right)$ exists as distereomers and decolourise bromine water. A on treatment with ethanolic solution of KOH produces isomeric $\mathrm{B}$ and $\mathrm{C}$ with their molecular formula $\mathrm{C}_{13} \mathrm{H}_{22} .$ Treatment of either $\mathrm{B}$ or $\mathrm{C}$ with Rany Nickel produces 4-isopropyl-1-tertiarybutyl cyclohexane. A on oxidative ozonolysis gives acetone as one product. Identify $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ considering $\mathrm{C}$ to be enantiomeric.
According to the information given in the above paragraph compound (B) will be

Key Concepts

Stereoisomerism

This concept involves compounds that have the same molecular formula and connectivity of atoms but differ in the three?dimensional orientations of their atoms in space. It distinguishes between diastereomers—which are non?mirror images that have different physical properties—and enantiomers, which are non-superimposable mirror images with identical physical properties except for their interaction with plane polarised light and reactions in chiral environments.

Dehydrohalogenation Reaction

A dehydrohalogenation reaction is an elimination reaction in which a hydrogen atom and a halogen atom are removed from adjacent carbon atoms in an alkyl halide, leading to the formation of a double bond. This reaction is typically promoted by a base, such as ethanolic KOH, and is essential for converting haloalkanes into alkenes, providing evidence of unsaturation in the molecular structure.

Bromine Water Test for Unsaturation

The bromine water test is a qualitative reaction used to detect the presence of carbon–carbon double bonds in an organic compound. When an unsaturated compound is added to bromine water, the characteristic brown color of bromine disappears as bromine adds across the double bond, indicating the existence of alkene functionality in the compound under investigation.

Catalytic Hydrogenation

Catalytic hydrogenation, often performed with Raney Nickel, is a reduction process that adds hydrogen across carbon–carbon multiple bonds, converting alkenes into alkanes. This reaction is useful for confirming the presence of unsaturation and for converting mixtures of isomers into a common saturated product, facilitating structural elucidation based on the resulting molecular framework.

Ozonolysis

Ozonolysis is an oxidative cleavage reaction that involves the treatment of an alkene with ozone to form an ozonide intermediate, which is subsequently decomposed to yield carbonyl compounds. The identity of these carbonyl fragments, such as acetone in this context, provides clues about the original structure of the alkene and helps in the determination of the positions of substituents and the nature of the double bond.

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