% 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 )