LEAST COORDINATION NUMBERA)Co2(CO)8 B)MN(CO)10

1.	LEAST COORDINATION NUMBERA)Co2(CO)8 B)MN(CO)10
Answer» A) Co2(CO)8 is known as dicobalt octacarbonyl and its structure is: Here each Co atom is surrounded by 4 CO ligands and 1 Co atom. So 1 Co atom is surrounded by total of 5 atoms. Therefore coordination number of Co is 5. B) Mn may bind itself with CO ligand as [Mn(CO)5]^- carbonylate ion, [Mn(CO)6]⁺ or polynuclear dimeric non-bridged complex, [Mn2(CO)10]. In case of polynuclear M-M complexes, Metal-Metal bond is covalent and only one electron is added to EAN. So, Coordination number of Mn is 6.

Answer»

A) Co2(CO)8 is known as dicobalt octacarbonyl and its structure is:

Here each Co atom is surrounded by 4 CO ligands and 1 Co atom.
So 1 Co atom is surrounded by total of 5 atoms.
Therefore coordination number of Co is 5.

B) Mn may bind itself with CO ligand as [Mn(CO)5]^- carbonylate ion, [Mn(CO)6]⁺ or polynuclear dimeric non-bridged complex, [Mn2(CO)10].

In case of polynuclear M-M complexes, Metal-Metal bond is covalent and only one electron is added to EAN.
So, Coordination number of Mn is 6.

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LEAST COORDINATION NUMBERA)Co2(CO)8 B)MN(CO)10

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