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Chapter 9: Q. 9-9-8 P-c (page 274)

Using any alkyne needed, how would you prepare the following alkenes?

(c) 3-Methyl-1-pentene

Short Answer

Expert verified

It鈥檚 the reagent used in the react to convert the akyne to alkene by hydrogenation when 1 equivalent When 2 equivalent is present alkyne convert to alkane.

Step by step solution

01

Lindlar catalyst

It鈥檚 the reagent used in the react to convert the akyne to alkene by hydrogenation when 1 equivalent When 2 equivalent is present alkyne convert to alkane.

02

Formation of cis-3-Heptene

Alkyne hydrogenation to alkene occurs when less active Lindlar catalyst is used which is a finely divided palladium metal with lead acetate and quinoline, an aromatic amine. The hydrogenation occurs with syn stereochemistry

03

Reaction with lindlar catalyst

When alkyne react with lindlar catalyst then it break the three out of one bond and convert alkyne to alkene by the addition of hydrogen to the atom and form alkene as shown:

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Most popular questions from this chapter

How would you carry out the following conversions? More than one

step is needed in each case.

How would you prepare the following carbonyl compounds starting from an alkyne (reddish brown Br)?

Show the terminal alkyne and alkyl halide from which the following products can be obtained. If two routes look feasible, list both.

What products would you expect from the following reactions?

a. CH3CH2CH2C鈮�CH+Cl2

Terminal alkynes react with and water to yield bromo ketones. For example:

Propose a mechanism for the reaction. To what reaction of alkenes is

the process analogous?
See all solutions

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