Question

The d-block elements forms coordination compounds.

1. Name the coordination compound K₃[CoF₆].

2. Write the electronic configuration of the central metal atom of the above complex by using CFT

3. Draw the figure to show the splitting of degenerate, ‘d’ orbitals in an octahedral field.

Answer 1

1. K₃[CoF₆] – Potassiumhexauridocobaltate(III)

2. The electronic configuration of Co (Z = 27) is [Ar]3d⁷4s² In K₃ [CoF₆], Co is in +3 state. 

The configuration of Co³⁺ is 3d⁶.4s°.