Coordination complex analyser
Give a coordination complex by its formula or its name and get what ISC Chemistry asks about it: the IUPAC name, oxidation state, coordination number, hybridisation and shape, unpaired electrons and magnetic moment, inner or outer orbital, crystal field splitting and isomers - with the valence bond box diagram.
Answer
[Cr(ox)3]3−
- IUPAC name
- trioxalatochromate(III)
- Hybridisation
- d2sp3
- Shape
- octahedral
- Oxidation state of Cr
- +3
- Coordination number
- 6
- Unpaired electrons
- 3
- Magnetic
- paramagnetic, μ = 3.87 BM
- Inner or outer orbital
- inner
- Crystal field stabilisation
- -1.2 Δ
- Isomerism
- optically active
Valence bond picture
Free Cr3+ ion (d3)
↑↑↑3d4s4p
In the complex (d2sp3; ×× = a ligand’s electron pair)
↑↑↑××××3d××4s××××××4p
Crystal field splitting
In an octahedral field the d orbitals split into t2g (lower) and eg (upper): t2g3 eg0. CFSE = (-0.4 × 3 + 0.6 × 0) Δo = -1.2 Δo.
Practise on real ISC questions
- Observe the diagram below of splitting of d-orbital in octahedral field and answer the following questions… 2027 Specimen
- The coordination number and the oxidation state of the central metal 'D' in the complex… 2025
- Choose the appropriate word(s) from the bracket [+2, ethane, tetrahedral, square planar, zero, dry cell… 2025
- Do you think $[\text{Co}(\text{en})_3]^{3+}$ will show optical isomerism? If yes, draw the possible isomers… 2025 Practice
- For the complex compound $[\text{Fe}(\text{en})_2\text{Cl}_2]\text{Cl}$, identify the following: (1)… 2026 Specimen
- Which one of the following complex ions has geometrical isomers? 2025 Specimen
- According to Crystal-Field Theory, the electronic configuration of complex compound [A] is $t_{2g}^4 e_g^2$… 2025
- Which one of the following is a tetrahedral complex as well as diamagnetic in nature? 2026
- The molecular shape of $[\text{Ni}(\text{CO})_4]$ is tetrahedral while that of… 2025 Practice
- Gia applied magnetic field around $[\text{Fe}(\text{H}_2\text{O})_6]^{2+}$ and… 2025 Practice
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