The structure of geranylgeranyl diphosphate is to be given and further a mechanism for its biosynthesis from farnesyl diphosphate and isopentenyl diphosphate is to be proposed. Concept introduction: The biosynthesis of geranylgeranyl dipoosphate (GGPP) from farnesyl diphosphate (FPP)and isopentenyl diphosphate(IPP) involves the attack of the double bond of IPP on FPP to produce a carbocation eliminating the diphosphate ion which is followed by deprotonation. To give: The structure of geranylgeranyl diphosphate and to propose a mechanism for its biosynthesis from farnesyl diphosphate and isopentenyl diphosphate.

Question

b) Certain cyclic compounds are known to be conformationally similar to carbohydrates, although they are not themselves carbohydrates. One example is Compound C shown below, which could be imagined as adopting four possible conformations. In reality, however, only one of these is particularly stable. Circle the conformation you expect to be the most stable, and provide an explanation to justify your choice. For your explanation to be both convincing and correct, it must contain not only words, but also "cartoon" orbital drawings contrasting the four structures. Compound C Possible conformations (circle one): Дет

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Chapter 27.SE, Problem 43AP

Interpretation Introduction

Interpretation:

The structure of geranylgeranyl diphosphate is to be given and further a mechanism for its biosynthesis from farnesyl diphosphate and isopentenyl diphosphate is to be proposed.

Concept introduction:

The biosynthesis of geranylgeranyl dipoosphate (GGPP) from farnesyl diphosphate (FPP)and isopentenyl diphosphate(IPP) involves the attack of the double bond of IPP on FPP to produce a carbocation eliminating the diphosphate ion which is followed by deprotonation.

To give:

The structure of geranylgeranyl diphosphate and to propose a mechanism for its biosynthesis from farnesyl diphosphate and isopentenyl diphosphate.

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