Question

The oxidation number d-arbitral occupation and co-ordination number of Cr in the complex cis [Cr(en)₂Cl₂]Cl are respectively.

Options

• +3, 3d and 4

• +3, 4d and 6

• +3, 3d and 6

• +2, 3d and 6

Answer 1

+3, 3d and 6

Explanation:

Cr = x + 2(–1) = +1

⇒ x = + 3

Cr⁺³ has 3d orbitals and a coordination number of 6 in the given complex.