Question

$\left[ CoCl _{2}\left( NH _{3}\right)_{4}\right]^{+}+ Cl ^{-} \longrightarrow \left[ CoCl _{3}\left( NH _{3}\right)_{3}\right]+ NH _{3}$ In the reaction only one isomer of complex product is obtained. The initial complex is

• A. cis isomer
• B. irons isomer
• C. not having stereoisomers
• D. either cis or trans

Answer 1

Answer: (B)

irons isomer

Answer 2

The original complex must have the chloride ions in the trans position, since then all other four positions which could be replaced are equivalent.