Hydrogen bonding specificity

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ashwathinair
Posts: 113
Joined: Sat Aug 17, 2019 12:17 am

Hydrogen bonding specificity

Postby ashwathinair » Fri Nov 08, 2019 2:03 pm

Why do hydrogen bonds only form between N, F and O? Why do they not form with elements in lower periods?

kpang_4H
Posts: 55
Joined: Fri Sep 20, 2019 12:17 am

Re: Hydrogen bonding specificity

Postby kpang_4H » Fri Nov 08, 2019 2:03 pm

Because those have high electronegativity which makes a strong dipole when bonded to the H.

Abigail Sanders 1E
Posts: 112
Joined: Wed Sep 11, 2019 12:16 am

Re: Hydrogen bonding specificity

Postby Abigail Sanders 1E » Fri Nov 08, 2019 2:05 pm

Yes, hydrogen bonds only form with N O F as those atoms often have very high electronegativity as well as often have lone pairs. The large electronegativity allows the positively charged H to interact with it in a slight bond.

chrischyu4a
Posts: 52
Joined: Thu Jul 25, 2019 12:16 am

Re: Hydrogen bonding specificity

Postby chrischyu4a » Fri Nov 08, 2019 3:36 pm

Hydrogen bonds only form between N, O, and F due to its high electronegativity. The high electronegativity results in an increased negative charge in those atoms which heavily attracts H atoms in adjacent molecules.


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