NEET2016ChemistryCoordination CompoundsActual
[ CuCl ₄ ]²⁻ exists while [ Cul ₄ ]²⁻ does not exist, because
Options
- AI ⁻ is stronger reductant than Cl ⁻
- BI ⁻ is weaker reductant than Cl ⁻
- CI ⁻ is stronger oxidant than Cl ⁻
- DNone of the above
Correct answer
A. I ⁻ is stronger reductant than Cl ⁻
Step-by-step solution
AsI- is stronger reducing agent, i.e., reductant than Cl ⁻ and reduces Cu ²⁺ into Cul and itself is oxidised into I ₂ . Cl ⁻ is not that much strong reducing agent and does not reduce Cu ²⁺ . Therefore, [ CuCl ₄ ]²⁻ exists but [ CuCl ₄ ]²⁻ does not.