Question

Explain the hybridization, geometry and magnetic property of $[Co{F}_6{]}^{3-}$ on the basis of valence bond theory. [Z of Co = 27]

Answer 1

The central $Co$ atom is $s{p}^3{d}^2$ hybridised. It forms octahedral complex with paramagnetic behavior due to presence of 4 unpaired electrons. It forms outer orbital or high spin or spin free complex as it utilizes outer 4d orbitals in $s{p}^3{d}^2$ hybridisation.