Question:
Which of the following compounds show optical isomerism?
(i) $cis-[Co(NH_3)_4Cl_2]^+$
(ii) $trans-[Co(en)_2Cl_2]^+$
(iii) $cis-[Co(en)_2Cl_2]^+$
(iv) $[Co(en)_3]^{3+}$
Choose the correct answer codes given below
Which of the following compounds show optical isomerism?
(i) $cis-[Co(NH_3)_4Cl_2]^+$
(ii) $trans-[Co(en)_2Cl_2]^+$
(iii) $cis-[Co(en)_2Cl_2]^+$
(iv) $[Co(en)_3]^{3+}$
Choose the correct answer codes given below
Updated On: Jun 6, 2022
- i and ii
- ii and iii
- iii and iv
- i, iii and iv
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The Correct Option is C
Solution and Explanation
The compounds, and cis $-\left[ Co ( en )_{2} Cl _{2}\right]^{+}$and $\left[ Co ( en )_{3}\right]^{3+}$ show optical isomerism as they do not possess any element of symmetry. The trans- $\left[ Co ( en )_{2} Cl _{2}\right]^{+}$exists in optically inactive meso form. cis $-\left[ Co \left( NH _{3}\right)_{4} Cl _{2}\right]^{+}$is also optically inactive as it contains plane of symmetry.
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Concepts Used:
Coordination Compounds
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
Coordination entity:
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
Ligands:
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.