Halogen bonding

[mik30102]

Hello everyone. Can someone please explain to me how the halogens make more then 1 bond like in Periodic acid? Thanks!

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[mik30102]

Ok so I found online that these are known as coordination complexes and involve the halgoens besides fluorine using their d shell to bond more. Is this all we need to know for mcat? I'm really not familiar with these kinds of compounds and have never dealt with them in my organic or gen chem classes...

 

[SnoopyMD]

Basically, fluorine can make only one bond while the other halogens can make more than one bond. This is due to fluorine being the only halogen without d orbitals.

(This trend is similar to the way that nitrogen is the only element in its period that can't make use of d orbitals for extra bonding.)