B stackrel text Lindlar/ H 2arrow R C ≡ CR stackrel text Na/liq.NH 3 longrightarrow A, A and B are geometrical isomers (R- CH = CH -R) then

Question

B stackrel text Lindlar/ H 2arrow R C ≡ CR stackrel text Na/liq.NH 3 longrightarrow A, A and B are geometrical isomers (R- CH = CH -R) then (A) A is cis, B is trans (B) A is trans, B is cis (C) A and B both are cis (D) A and B both are trans

Tardigrade Admin · Accepted Answer

Lindlar's catalyst gives cis product thus B is cis and Na/liq. NH 3 give trans product. Thus A is trans.

Q. $B \leftarrow Lindlar/ H_{2} RC \equiv CR ⟶ Na/liq.NH_{3} A, A$ and $B$ are geometrical isomers $(R - C H = C H - R)$ then

$A$ is cis, $B$ is trans

$A$ is trans, $B$ is cis

$A$ and $B$ both are $c i s$

$A$ and $B$ both are trans

Lindlar's catalyst gives cis product thus $B$ is cis and Na/liq. $N H_{3}$ give trans product. Thus $A$ is trans.

Q. B← Lindlar/ H2​RC≡CR⟶ Na/liq.NH 3​​A,A and B are geometrical isomers (R−CH=CH−R) then

A is cis, B is trans

A is trans, B is cis

A and B both are cis

A and B both are trans