Chemistry | VITEEE 2018 | Discussion Page

Which one of the following has an optical isomer?

(en = ethylenediamine)

$\left[Zn(en) (NH_{3})_{2}\right]^{2+}$

$\left[Co(en)_{3}\right]^{3+}$

$\left[Co(H_{2}O)_{4}(en)\right]^{3+}$

$\left[Zn(en)_{2}\right]^{2+}$

Option B

Option (b) shows optical isomerism

$\left[Co(en)_{3}\right]^{3+}$

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Complexes of Zn⁺⁺ cannot show optical isomerism as they are tetrahedral complexes with plane of symmetry

$\left[Co(H_{2}O)_{4}(en)\right]^{3+}$ have two planes of symmetry hence it is also optically inactive.

$\left[Zn(en)_{2}\right]^{2+}$ cannot show optical isomerism

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