What are the types of hybridisation of iodine in interhalogen compounds IF3,IF5 and IF7, respectively?
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Solution
The central iodine atom in IF3 has 3 bond pairs and 2 lone pairs of electrons. It undergoes sp3d hybridisation which results in trigonal bipyramidal (T-shaped) geometry. The central iodine atom in IF5 has 5 bond pairs and 1 lone pair of electrons. It undergoes sp3d2 hybridisation which results in octahedral (square pyramidal) geometry. The central iodine atom in IF7 has 7 bond pairs and 0 lone pairs of electrons. It undergoes sp3d3 hybridisation which results in pentagonal bipyramidal geometry.