The compound $\left[{\mathrm{CoCl}}_2{\left({\mathrm{NH}}_3\right)}_2\left(\mathrm{en}\right)\right]$ can form

_{The compound [CoCl2}​_{(NH3​)2​(en)] has two geometrical isomers. One is the cis-isomer (with respect to NH3​) and the other is the trans- isomer (with respect to NH3})_.

The cis-isomer has two optically active forms, d−cis isomer and l−cis isomer. So, the compound [CoCl2​(NH3​)2​(en)] can form geometrical isomers as well as optical isomers.