Question

In which one of the following species the central atom has the type of hybridisation which is not the same as that present in the other three

Moderate

Solution

In ${SbCl}_{5}^{2 -}, Sb$ is $s p^{3} d^{2}$ hybridised, and rest are $s p^{3} d$
SF₄: H=1/2[7+4−0+0]=5(sp³d)
l⁻³: H=1/2[7+2−0+1]=5(sp³d)
(SbCl₅)²⁻: H=1/2[5+5−0+2]=6(sp³d²)
PCl₅: H=1/2[5+5−0+0]=5(sp³d)
Where H=no. of hybrid orbitals

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