Chemical Bonding and Molecular Structure Part 1

Isostructural compounds are those compounds which have same structure as well as same hybridisation. Formula for find hybridisation : H=(lp+σ+ coordinate bond )
Ip‌‌=‌ Lone pair ‌
bp‌‌=‌ Bond pair ‌
σ‌‌=‌ Sigma bond ‌If number of sigma bond (σ), co-ordinate bond and lone pair are same for given pairs, they are isostructural.
Hence, SO42−,CrO42−,SiCl4 and TiCl3 have tetrahedral shape and are isostructural.