What reactants and reagents would be best for preparing 3,5-octadiene and why ?

ID: 846692 • Letter: W

Question

What reactants and reagents would be best for preparing 3,5-octadiene and why ?

a) 1,3-cyclopentadiene and KOH

b) 6-Bromo-6-methyl-3-hexne followed by KOH and heat

c) 7-Bromo-7-methyl-3-hexene followed by HCL

d) 5-methyl-3-hexene followed by KOH

In the compounds listed below, one has the lowest heat of hydrogenation, which compound is this and why ?

a) allene

b) 1,3-cyclopentdiene

c) 2,3 -hexadiene

d) 2,5-heptadiene

What are the best reagents to carry out the synthesis of butyl benzene and why?

a) isobutyl chloride and benzene

b) benzene, propanoyl chloride/aluminum chloride, followed by hydrazine

c) benzene, butanoyl chlroide/aluminum chloride, followed by hydrazine

d) styrene followed by h2 addition with nickel catalyst

1,b) 6-Bromo-6-methyl-3-hexne followed by KOH and heat

2. d) 2,5-heptadiene ( have isolated double bonds)

3.c) benzene, butanoyl chlroide/aluminum chloride, followed by hydrazine

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