JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
Octahedral complexes of copper \((II)\) undergo structural distortion (Jahn-Teller). Which one of the given copper \((II)\) complexes will show the maximum structural distortion? (en-ethylenediamine; \(H _{2} N - CH _{2}- CH _{2}- NH _{2}\) )
- A \([ Cu ( H _{2} O )_{6}] SO _{4}\)
- B \([ Cu ( en )( H _{2} O )_{4}] SO _{4}\)
- C cis- \([ Cu ( en )_{2} Cl _{2}]\)
- D trans- \([ Cu ( en )_{2} Cl _{2}]\)
Answer & Solution
Correct Answer
(A) \([ Cu ( H _{2} O )_{6}] SO _{4}\)
Step-by-step Solution
Detailed explanation
There is unsymmetric filling of \(e_{g}\) subset of \(Cu ^{+2} \;ion\), while there is symmetrical distribution in \(t _{2 g }\) set, if the complex has same ligand there will be equal repulsion which leads to symmetrical bond length along \(t _{2 g }\) , but due to uneven…
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