Question

Which of the $ d $ -orbital is used in $ sp^3d $ hybridisation?

• A. $ d_{xy} $
• B. $ d_{x^2-y^2} $
• C. $ d_{z^2} $
• D. $ d_{yz} $

Answer 1

Answer: (C)

The hybridisation of one $s$, one $d$ and three $p$-orbitals on a central atom gives rise to five $sp^3d$ orbitals, three equatorial and two axial. This hybridisation uses one $d_z^2$, one $s$ and all three of the $p$ orbitals and shape of the molecule becomes trigonal bipyramidal.