Question

Consider the following reaction and statements:
$\left[Co\right(N{H}_3{)}_{4}B{r}_2{]}^{+}+B{r}^{-}\to \left[Co\right(N{H}_3{)}_{3}B{r}_3]+N{H}_3$
(I) Two isomers are produced if the reactant complex ion is a cis -isomer .
(II) Two isomers are produced if the reactant complex ion is a trans-isomer.
(III) Only one isomer is produced if the reactant complex ions is a trans- isomer.
(IV) Only one isomer is produced if the reactant complex ion is a cis - isomer.
The correct statements are:

• A. $\left(III\right)$ and $\left(IV\right)$
• B. $\left(II\right)$ and $\left(IV\right)$
• C. $\left(I\right)$ and $\left(II\right)$
• D. $\left(I\right)$ and $\left(III\right)$

Answer 1

The correct option is D $\left(I\right)$ and $\left(III\right)$

From the given image it is clear that two isomers are produced if the reactant complexion is a cis-isomer, as well as only one isomer, is produced if the reactant complex is a trans-isomer.

Statement (I) and (III) are correct.