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1. Predict whether the following complexes would be labile or inert and explain

ID: 1053733 • Letter: 1

Question

1. Predict whether the following complexes would be labile or inert and explain your answers. The magnetic moment of each complex in Bohr Magnetons (uB) is for each complex. Potassium hexacyanoferrate(III) (uB=2.40) Hexaammineiron(II) chloride (Hs= 5.45) a) b) Rank the following metal complexes in order of rate of reaction with H20 to substitute ligands from lowest to highest. Provide the reasoning for you order. 2. [Co(NHs)s]". [Rh(NH%)". [Ir(NH,". [MnH2Ok]". [Ni( H2O)]2. 3. Design two step syntheses of cis-and trans-[PtCl2(NO-XNHs)]. starting from [PtCI4

Explanation / Answer

1) the given complexes are

a) Potassium hexacyanoferrate(iii)

Oxidation state of iron = Fe3+

d electrons will be = 5

then the complex will be low spin due to the presence of the strong field ligand and there will be one unpaired electron left and the hybridization will be d2sp3

The given complex is inert in nature based on the valence bond theory as it doesn't have any empty inner d- orbital

b) Haxammineiron(ii) chloride

Oxidation state of iron = +2

d electrons = 6

ammonia is a weak field ligand so the complex will be high spin.

There will be 4 unpaired electrons .All the orbitals are also filled here so the given complex is also inert and the hybridization is sp3d2 .