Identify the alkyne in the following sequence of reactions, Alkyne xrightarrow[ text Lindlar's catalyst ] H 2 A xrightarrow text Ozonolysis underset text only B xleftarrow[ text process ] text Wacker CH 2= CH 2

Question

Identify the alkyne in the following sequence of reactions, Alkyne xrightarrow[ text Lindlar's catalyst ] H 2 A xrightarrow text Ozonolysis underset text only B xleftarrow[ text process ] text Wacker CH 2= CH 2  (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} P d C l_{2} \cdot C u C l_{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,

Therefore, alkyne must be

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

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

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

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

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

Q. Identify the alkyne in the following sequence of reactions, Alkyne H2​ Lindlar’s catalyst ​A Ozonolysis ​ only B​ Wacker process ​CH2​=CH2​

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 $H_{2} Lindlar’s catalyst A Ozonolysis only B Wacker process C H_{2} = C H_{2}$

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

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

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

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