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Answer the following about the coordination compound.
For the complex ion , state: (i) the type of hybridisation. (ii) the magnetic behaviour. (iii) the…
For the complex ion $[\text{Fe}(\text{CN})_6]^{3-}$, state:
(i) the type of hybridisation.
(ii) the magnetic behaviour.
(iii) the oxidation number of the central metal atom.
Answer
Answer
AI| Oxidation state | 3 |
| Hybridisation | d2sp3 |
| Magnetic behaviour | paramagnetic |
(i) $d^2sp^3$ hybridisation (inner orbital, octahedral complex).
(ii) Paramagnetic, because $\mathrm{Fe^{3+}}$ ($3d^5$) has one unpaired electron with the strong field ligand $\mathrm{CN^-}$ (low spin).
(iii) Oxidation number of Fe = +3.
From ISC 2018 Chemistry Paper 1, question 12(a).
Check your working with the Coordination complex analyser: hybridisation, shape, magnetic moment, CFSE, isomers and the IUPAC name of a complex.