Chapter 11.8, Problem 13P

Interpretation Introduction

Interpretation:

Whether $\text{2-Methyl-2,3-pentadiene}$ and $\text{2-chloro-2,3-pentadiene}$ are chiral or not, are to be discussed.

Concept Introduction:

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Allenes are cumulated dienes in which two $C=C$ units share a single carbon atom.Allenes have a linear carbon chain and two mutually perpendicular $\pi$ bonds.

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An allene is chiral if each carbon atom at the two ends of the $C=C=C$ unit is attached to two different substituents.

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Even if one of those carbon atoms at the end is attached to two identical substituents, the allene is achiral.