In each reaction box, place the best reagent and conditions from the list below. in each…
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Question “In each reaction box, place the best reagent and conditions from the list below. in each…”
Answer
Propyne is formed by the following processes: deprotonation with soda amide, alkylation with acetylides; hydrogenation with
; Lindlar’s catalytic.
The complete chain of reactions that lead to the formation and use of the products must first be determined. Then, all the reagents used in the reaction are identified.
Formation of acetylides occurs during deprotonation. Soda amide
is the reagent that is used to deprotonate an alkyne. It is strong and can be used as a nucleophile. This is the reaction.
Alkylation with acetylides It is the nucleophilic substitution reaction
. Here is the general reaction.
.
Hydrogenation alkynes:It refers to adding hydrogen to the alkyne. With the help of
Lindlar’s catalyst, the alkyne can be hydrogenated to cisalkene. This is the reaction.
Epoxidation alkenes: In this reaction, an alkene is used to make the epoxide. This reaction occurs in the presence peracids. The most commonly used peracid is meta-chloroperbenzoic acid
. Here is the reaction.
and mechanisms can be used to open the ring. The hydrolysis of asymmetrical epoxide occurs via
and a nucleophile attack at the lesssubstituted carb of the epoxide. Here is the reaction.
These chemical reactions can help you understand how propyne forms the products.
The sequential order of reagents and conditions that are required for the formation of pentane
diol are the following:
1.For the deprotonation alkyne:
.
.
3.For conversion of alkyne into alkene:
.
.
5. For the opening of an epoxide-ring:
Ans:
The sequential order of reagents and the conditions that are required for the formation of pentane
diol are shown below.
Conclusion
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