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Chapter 7: Q38P (page 315)

What reagents would you use for the following synthesis?

a. (Z)-3-hexene from 3-hexyne

b. (E)-3-hexene from 3-hexyne

c. hexane from 3-hexyne

Short Answer

Expert verified

a.H2/ Lindlar catalyst

b. Na, NH3 (liq), -78˚C

c.Excess H2, Pd/ C

Step by step solution

01

Step 1:

3-hexyne undergoes hydrogenation in presence of Lindlar’s catalystto form (Z)-3-hexene.

02

Step 2

3-hexyne reacts with Na, NH3(liq) at -78˚C to form (Z)-3-hexene.

03

Step 3:

3-hexyne reacts with excess H2 in presence of Pd/ C to form (Z)-3-hexene.

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Most popular questions from this chapter

What is the major product of the reaction of 1 mol of propyne with each of the following reagents?

a.HBr (1 mol)

b.HBr (2 mol)

c.Br2(1 mol)/CH2Cl2

d.Br2 (2 mol)/CH2Cl2

e.aqueous H2SO4, HgSO4

f.R2BH in THF followed byH2O2/HO- /H2O

g.excess H2, Pd/C

h.H2/Lindlar catalyst

i.sodium amide

j.the product of part i followed by1-chloropropane

Explain why sodium amide cannot be used to form a carbanion from an alkane in a reaction that favors products.

Name the following:

Name the following:

Name the following:
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