`MeC-=C-COCl overset(H_(2)+ "Lindlar's Catalyst")(rarr)(A)`
The Product `(A)` is:

CH underset((ii) CH_(3)Br)overset((i) NaNH_(2), NH_(3))rarr (A) underset("Lindlar catalyst")overset(H_(2))rarr (B) , Product (B) is :

a) Draw the stereochemical structure of the product in the following reaction. R-C-=C-R overset(H_(2))underset("Lindlar's catalyst")to b) Write down the structures of the stereoisomers formed when cis-2-butene is reacted with bromine.

a) Draw the stereochemical structure of the product in the following reaction. R-C-=C-R overset(H_(2))underset("Lindlar's catalyst")to b) Write down the structures of the stereoisomers formed when cis-2-butene is reacted with bromine.

Nr-(CH_(2))_(12)-C-=CHoverset(NaNH_(2))(to)(A)overset("Lindlar")underset("Catalyst")(to)(B), Product (B) is:

The reaction, RC-=CR underset("Lindlar's catalyst")overset(H_(2))to Gives the main product as

R-underset((A))-=--=-Roverset("Lindlar's catalyst" +H_2)rarr(B) Compounds (B) and (C) are: