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 )

Question

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]

Tardigrade Admin · Accepted Answer

There is unsymmetric filling of eg 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 filling of electron in e g subset, either octahedral will be elongated or compressed.

Q. 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; $H_{2} N - C H_{2} - C H_{2} - N H_{2}$ )

$[C u (H_{2} O)_{6}] S O_{4}$

$[C u (e n) (H_{2} O)_{4}] S O_{4}$

cis-[Cu(en $)_{2} C l_{2}]$

trans- $[C u (e n)_{2} C l_{2}]$

Q. 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; H2​N−CH2​−CH2​−NH2​ )

[Cu(H2​O)6​]SO4​

[Cu(en)(H2​O)4​]SO4​

cis-[Cu(en )2​Cl2​]

trans- [Cu(en)2​Cl2​]

Q. 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; $H_{2} N - C H_{2} - C H_{2} - N H_{2}$ )

$[C u (H_{2} O)_{6}] S O_{4}$

$[C u (e n) (H_{2} O)_{4}] S O_{4}$

cis-[Cu(en $)_{2} C l_{2}]$

trans- $[C u (e n)_{2} C l_{2}]$