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Chapter 7: Q19P (page 304)

Describe the alkyne you would start with and the reagents you would use if you wanted to Synthesize

a. Pentane. b. Cis-2-butene. c. trans-2-pentene. d. 1-hexene.

Short Answer

Expert verified

1. H2 in presence of Pd/C becomes strong reducing agent and form primary alkane from alkyne.

2. H2 in presence of lindlar catalyst stops the reaction at alkene stage.

3. Na/NH3cannot be used to reduce terminal alkynes, because Na will remove the hydrogen that is attached to the sp carbon of the terminal alkyne.

Step by step solution

01

Some conclusions

1. H2 in presence of Pd/C becomes strong reducing agent and form primary alkane from alkyne.

2. H2 in presence of lindlar catalyst stops the reaction at alkene stage.

3. Na/NH3cannot be used to reduce terminal alkynes, because Na will remove the hydrogen that is attached to the sp carbon of the terminal alkyne.

02

Final answer

So the final reactions are-

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Most popular questions from this chapter

Which of the following names are correct? Correct those that are not correct.

a. 4-heptyne

b. 2-ethyl-3-hexyne

c. 4-chloro-2-pentyne

d. 2,3-dimethyl-5-octyne

e. 4,4-dimethyl-2-pentyne

f. 2,5-dimethyl-3-hexyne

What reagents should be used to carry out the following synthesis?

Name the following:

Draw a condensed structure for each of the following:

a.2-hexyne

b.5-ethyl-3-octyne

c.methylacetylene

d.vinylacetylene

e.methoxyethyne

f.sec-butyl-tert-butylacetylene

g.1-bromo-1-pentyne

h.5-methyl-2-cyclohexenol

i.diethylacetylene

j.di-tert-butylacetylene

k.cyclopentylacetylene

l. 5,6-dimethyl-2-heptyne

What is the molecular formula of a hydrocarbon that has 1 triple bond, 2 double bonds, 1 ring, and 32 carbons?
See all solutions

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