InterviewSolution
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InterviewSolution
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`CN^(-)` is a strong field ligand. This is due to the fact thatA. it carries a negative chargeB. it is a pseudohalideC. it can accept electrons form metal speciesD. it form high spin complexes with metal species |
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Answer» Correct Answer - C Ligands such as CO, `CN^(-)` and `NO^(+)` have empty `pi` orbitals with the sorrect symmetry to overlap with the metal `t_(2g)` orbitals, forming `pi` bonds. This is often described as back bonding. Normally the `pi` orbitals on the ligands are higher energy than th emetal `t_(2g)` orbitals. No more electrons are added to the scheme as the ligand `pi` orbitals are empty, but the `pi` interaction increases the value of `Delta_(o)` . This accounts for th eposition of these ligands as strong field ligands, at the right of the spectrochemical series. |
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