Q. 635.0( 5 Votes )
Describe hybridisation in the case of PCl5 and SF6. The axial bonds are longer as compared to equatorial bonds in PCl5 whereas in SF6 both axial bonds and equatorial bonds have the same bond length. Explain.
The hybridization of the P in PCl5 is sp3d and the hybridization of the S in SF6 is sp3d2.
PCl5 has trigonal bipyramidal geometry. In this case, the axial bonds are slightly longer than the equatorial bonds. This is because the axial bonds experience greater repulsion from other bonds than the equatorial bonds.
SF6 has an octahedral structure. In this case, all the bonds have the same length since all bonds experience similar repulsion from other bonds.
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