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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; H2N - CH2 - CH2 - NH2)(A) [Cu(H2O)6]SO4 (B) [Cu(en)(H2O)4]SO4(C) cis-[Cu(en)2Cl2] (D) trans-[Cu(en)2Cl2] |
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Answer» (A) [Cu(H2O)6]SO4 There is un symmetric filling of eg subset of Cu+2 ion, while there is symmetrical distribution in t2g set, if the complex has same ligand there will be equal repulsion which leads to symmetrical bond length along t2g , but due to uneven filling of electron in eg subset, either octahedral will be elongated or compressed. |
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