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प्रश्न
Answer in brief.
What are strong field and weak field ligands ? Give one example of each.
उत्तर
i. Strong field ligands: Those ligands which cause larger splitting of d orbitals and favour pairing of electrons are called strong field ligands. Strong field ligands contain C, N, and P as donor atoms.
e.g. CN– , NCS– , CO, NH3, EDTA, en (ethylenediammine).
ii. Weak field ligands: Those ligands which cause lower splitting of d orbitals i.e., ∆° parameter is smaller compared to the energy required for the pairing of electrons are called weak field ligands. Weak field ligands contain halogen, O, and S as donor atoms.
e.g. F– , Cl– , Br– , I–, SCN–, `"C"_2"O"_4^{2-}`.
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\[\ce{[Ni(CN)4]^2-}\]
