Identify the alkyne in the following sequence of reactions, Alkyne -[H2][ textLindlar 's catalyst] A -[ textOzonolysis] underset textonlyB

Question

Identify the alkyne in the following sequence of reactions, Alkyne ->[H2][ textLindlar 's catalyst] A ->[ textOzonolysis] underset textonlyB <-[ textWacker][ textProcess] CH2 = CH2 (A) H 3 C - C ≡ C - CH 3 (B) H 3 C - CH 2- C ≡ CH (C) H 2 C = CH - C ≡ CH (D) HC ≡ C - CH 2- C ≡ CH

Tardigrade Admin · Accepted Answer

In Wacker process, alkene is oxidised into aldehyde.

C H_{2} = C H_{2} + \frac{1}{2} O_{2} PdC l_{2} \cdot CuCl_{2} H_{2} O (B) C H_{3} C H O

Since on ozonolysis, only alkenes produce aldehydes, '

A

' must be an alkene. To decide the structure of alkene that undergoes ozonolysis, bring the products together in such a way that

O

atoms are face to face and, replace

O

by double

(=)

bond. Thus,

Q. Identify the alkyne in the following sequence of reactions,
$Alkyne H_{2} Lindlar ’s catalyst A$ $Ozonolysis only B$ $Wacker Process CH X_{2} = CH X_{2}$

$H_{3} C - C \equiv C - C H_{3}$

$H_{3} C - C H_{2} - C \equiv C H$

$H_{2} C = C H - C \equiv C H$

$H C \equiv C - C H_{2} - C \equiv C H$

Q. Identify the alkyne in the following sequence of reactions, AlkyneH2​Lindlar ’s catalyst​AOzonolysis​onlyB​WackerProcess​CHX2​=CHX2​

H3​C−C≡C−CH3​

H3​C−CH2​−C≡CH

H2​C=CH−C≡CH

HC≡C−CH2​−C≡CH

Q. Identify the alkyne in the following sequence of reactions,
$Alkyne H_{2} Lindlar ’s catalyst A$ $Ozonolysis only B$ $Wacker Process CH X_{2} = CH X_{2}$

$H_{3} C - C \equiv C - C H_{3}$

$H_{3} C - C H_{2} - C \equiv C H$

$H_{2} C = C H - C \equiv C H$

$H C \equiv C - C H_{2} - C \equiv C H$