The mechanism for the biological conversion of linalyl diphosphate to limonene is to be drawn. Concept introduction: In biological reactions, allylic carbocations are the intermediates that are required for the formation of limonene. The general steps involved in the biological formation of limonene are stated below. • The first step is the generation of allylic carbocation by the loss of the diphosphate group. • The second step is the formation of six-membered ring. • The third step is the deprotonation to give final product.

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Chapter 14, Problem 62P

Interpretation Introduction

Interpretation: The mechanism for the biological conversion of linalyl diphosphate to limonene is to be drawn.

Concept introduction: In biological reactions, allylic carbocations are the intermediates that are required for the formation of limonene.

The general steps involved in the biological formation of limonene are stated below.

• The first step is the generation of allylic carbocation by the loss of the diphosphate group.

• The second step is the formation of six-membered ring.

• The third step is the deprotonation to give final product.

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