question_answer

The metal d- orbital that are directly facing the ligands in \[{{K}_{3}}[Co{{(CN)}_{6}}]\]are [JEE Main Online Paper Held On 12-Jan-2019 Morning]

A) \[{{d}_{xy}}and\,{{d}_{{{x}^{2}}-{{y}^{2}}}}\]                             

B) \[{{d}_{xy'}}{{d}_{xz}}\,and\,{{d}_{yz}}\]

C) \[{{d}_{{{x}^{2}}-{{y}^{2}}}}\,and\,{{d}_{{{z}^{2}}}}\]              

D)   \[{{d}_{xy'}}{{d}_{yz}}\,and\,{{d}_{{{z}^{2.}}}}\]

Correct Answer: C

Solution :

Due to presence of strong ligand \[(C{{N}^{-}})\]pairing occurs in which two d-orbitals i.e., \[{{d}_{{{x}^{2}}-{{y}^{2}}}}\] and \[{{d}_{{{z}^{2}}}}\]directly face the  -CN ligand.