Valence bond approach
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See all →- Given below are two statements :Statement I : Both [Co(NH_3)_6]^3+ and [CoF_6]^3- complexes are octahedral but differ in their magnetic behaviour.Statement II : [Co(NH_3)_6]^3+ is diamagnetic whereas [CoF_6]^3- is paramagnetic.In the light of the abo… Answer: 2. Both Statement I and Statement II are true. Key idea: the ligand field strength decides pairing in mathrmCo³⁺ ( d⁶ ). NH₃ is a st... 1
- The geometry and magnetic behaviour of the complex [Ni(CO)_4] are Answer: 3. tetrahedral geometry and diamagnetic In [Ni(CO)₄] Ni is in the zero oxidation state with configuration 3d⁸ 4s² . CO is a strong-f... 1
- Pick out the correct statement with respect to [Mn(CN)_6]^3- : Answer: 2. It is d²sp³ hybridised and octahedral Key idea: cyanide is a strong-field ligand, which pairs the d electrons. In [Mn(CN)₆]³⁻ , M... 1
- Which of the following has longest C-O bond length ? (Free C-O bond length in CO is 1.128\ .) Answer: 3. [Fe(CO)₄]²⁻ Key idea: in metal carbonyls, back bonding from metal d orbitals into the CO π^* orbital weakens the C-O bond and len... 1