Chemistry Class 12 NCERT Solutions: Chapter 9 Coordination Compounds Part 8

Download PDF of This Page (Size: 231K)

Q: 22. Discuss the nature of bonding in metal carbonyls.

Answer

The metal-carbon bonds in metal carbonyls have both σ and π characters. A bond is formed when the carbonyl carbon donates a lone pair of electrons to the vacant orbital of the metal. A bond is formed by the donation of a pair of electrons from the filled metal d orbital into the vacant anti-bonding orbital (also known as back bonding of the carbonyl group). The σ bond strengthens the π bond and vice-versa. Thus, a synergic effect is created due to this metal-ligand bonding. This synergic effect strengthens the bond between and the metal.

Q 22 The Neture of Bonding in Metal Carbonyls

Q 22 the Neture of Bonding in Metal Carbonyls

Q 22 The Neture of Bonding in Metal Carbonyls

Q: 23. Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complexes:

(i)

(ii)

(iii)

(iv)

Answer:

(i)

The central metal ion is .

Its coordination number is

The oxidation state can be given as:

The orbital occupation for .

(ii)

The central metal ion is .

The coordination number is .

The oxidation state can be given as:

The d orbital occupation for .

(iii)

The central metal ion is .

The coordination number is .

The oxidation state can be given as:

The d orbital occupation for .

(iv)

The central metal ion is .

The coordination number is .

The oxidation state can be given as:

The d orbital occupation for .