Why interhalogen compounds always form a odd no. Valency?
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Why do all inter-halogen compounds contain an even number of atoms?
All halogens have one electron in their valence shell. One covalent bond is formed by 2 halogen atoms (sharing one electron each). If in the compound an odd number of atoms were involved, then an odd electron compound (unstable) would be formed. IF4 would contain 1 lone pair and 1 odd electron, hence unfavorable.
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All halogens have one electron in their valence shell. One covalent bond is formed by 2 halogen atoms (sharing one electron each). If in the compound an odd number of atoms were involved, then an odd electron compound (unstable) would be formed. IF4 would contain 1 lone pair and 1 odd electron, hence unfavorable.
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