% Ionic character: HF > HCl > HBr > HI Dipole moment: HF > HCl > HBr > HI Electronegativity decreases down the group. Reducing power: HF < HCl < HBr < HI
45. Reactivity with metals: Halogens react with metals to form halides. Ionic character: MF > MCl > MBr > MI
Halides in higher oxidation state will be more covalent than the one in the lower oxidation state.
46. Interhalogen compounds: Reactivity of halogens towards other halogens:
Binary compounds of two different halogen atoms of general formula X X’ n are called interhalogen compounds where n = 1, 3, 5, or 7 These are covalent compounds.
All these are covalent compounds.
Interhalogen compounds are more reactive than halogens because X-X’ is a more polar bond than X-X bond.
All are diamagnetic.
Their melting point is little higher than halogens.
XX’( CIF, BrF, BrCl, ICl, IBr, IF)( Linear shape)
XX’ 3( CIF3, BrF3, IF3, ICl3)( Bent T- shape)
XX’ 5 – CIF5, BrF5, IF5,( square pyramidal shape)
XX’ 7 – IF7( Pentagonal bipyramidal shape)