Of the following complex ions which one can form a chelate with ethylenediamine?

Options

A. `cis-[Co(en)_(2)Cl_(2)]^(+)`
B. trans-`[Co(NH_(3))_(4)Cl_(2)]^(+)`
C. trans-`[Co(NH_(3))_(2)Cl_(4)]^(-)`
D. trans-`[Co(en)_(2)Cl_(2)}^(+)`

Answer

A

Explanation

Cis -`[Co(en)_(2)Cl_(2)]^(+)` can form a chelate complex.