Exams › JEE Advanced › Chemistry

Which of the following coordination complexes exhibits both geometrical isomerism and optical isomerism?

1. [Co(en)2Cl2]+
2. [Co(NH3)5Cl]2+
3. [Co(NH3)4Cl2]+
4. [Cr(Ox)3]3-

Correct answer: [Co(en)2Cl2]+

Solution

[Co(en)2Cl2]+ shows cis and trans geometric isomers; the cis isomer is non-superimposable on its mirror image (it has no plane of symmetry), so it exists as d and l optical isomers. No other option in the list satisfies both conditions simultaneously.

Related JEE Advanced Chemistry questions

• The pair(s) of coordination complexes/ions exhibiting the same kind of isomerism is(are) -
• A 0.01 molal solution of a cobalt(III) chloride-ammonia complex, which dissociates completely, has a freezing point of -0.0558°C. Based on this data, how many chloride ions are present within the coordination sphere of the complex? [Kf for water = 1.86 K kg mol⁻¹]
• What are the molecular shapes of the ammonia complexes formed by Ni²⁺, Pt²⁺, and Zn²⁺, respectively?
• What are the spin-only magnetic moments (in Bohr Magneton) for the complexes [Cr(NH₃)₆]³⁺ and [CuF₆]³⁻, given that the atomic numbers of Cr and Cu are 24 and 29, respectively?
• When K3[Fe(CN)6] reacts with freshly prepared FeSO4, a dark blue solid known as Turnbull's blue is formed. On the other hand, when K4[Fe(CN)6] reacts with FeSO4 in the complete absence of air, a white solid X is produced, which later turns blue when exposed to air. Additionally, if FeSO4 is mixed with NaNO3 and concentrated H2SO4 is carefully added along the side of a test tube, a brown ring forms. What is the chemical identity of precipitate X?
• Which of the following compounds is responsible for the appearance of the brown ring?

⚔️ Practice JEE Advanced Chemistry free + battle 1v1 →