Question

Which of the following complexes are not correctly matched with the hybridisation of their central metal ion?

(i) Ni(CO)₄ ⇒ sp³
(ii) [Ni(CN)₄] ⇒ sp³
(iii) [C₆F₆]^-3 ⇒ d²sp³
(iv) [Fe(CN)₆]^-3 ⇒ sp³d²

(a) (i) and (ii)
(b) (ii), (iii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii) and (iv)

Answer 1

(b) (ii), (iii) and (iv)

is a weak ligand and cannot force ‘d’ electrons to pair up forming outer orbital complex.