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Coordination Compounds
Write the coordination number and oxidation state of Platinum in the complex [Pt(en)2Cl2].
Coordination number and oxidation state of the given compound is given as,
Coordination no. = denticity × number of ligand
Coordination number = 2 × 2 + 2 × 1 = 6
Charge on ligand + O.S. of metal ion = charge on complex
– 2 + x = 0
⇒ x = +2
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Indicate the type of isomerism exhibited by the following complexes and draw structures for these isomers:
(i) K[Cr(H2O)2(C2O4)2], (ii) [Co(en)3Cl3,
(iii) [Co(NH3)5(NO2)]|NO3]2, (iv) [Pt(NH3)(H2O)Cl2]
Predict the number of unpaired electrons in the square planar [Pt(CN)4,]2– ion.
The hexaquo manganese(II) ion contains five unpaired electrons, while the hexacynoion contains only one unpaired electron. Explain using crystal field theory.
Identify the ligands from the following coordination compounds:
(a) [Co(en)2Cl(NO2)2]
(b) K[Co(CN)(CO2)(NO)]
(c) K3[Al(OH)6]
(d) [Co(H2O)2(NH3)4](OH)3
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