Lone pairs and hydrogen bonding

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Ethan McCarthy 1F
Posts: 31
Joined: Wed Feb 27, 2019 12:17 am

Lone pairs and hydrogen bonding

Postby Ethan McCarthy 1F » Tue Jul 30, 2019 9:12 pm

Are lone pairs required for hydrogen bonding to occur or is it just that lone pairs tend to exist in molecules that can hydrogen bond because these molecules are more likely to have dipole moments?

Bella Martin
Posts: 47
Joined: Wed Sep 21, 2016 2:57 pm

Re: Lone pairs and hydrogen bonding

Postby Bella Martin » Tue Jul 30, 2019 9:45 pm

If we think about water, H2O, the Hydrogen doesn't have any lone pairs but is still able to create hydrogen bonding with another H2O molecule by way of the lone pairs on the oxygen atom. So both!

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Re: Lone pairs and hydrogen bonding

Postby Chem_Mod » Tue Jul 30, 2019 10:01 pm

In hydrogen bonding, the hydrogen bond donor must have a hydrogen attached to a highly electronegative atom (N,O,F). The hydrogen bond acceptor has a lone pair of electrons on a small highly electronegative atom (N,O,F).

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