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Hydrogen Bonds

Posted: Sun Dec 01, 2019 8:22 pm
by Andrea_1H
Why would we consider lone pairs on N or O possible hydrogen bonding sites?

Re: Hydrogen Bonds

Posted: Sun Dec 01, 2019 8:29 pm
by ishaa Diwakar 4E
Because the requirements for a H-bond to form are that there is an H bonded to a N, O or F, and that there is another N, O or F nearby that is charged or has a lone pair. Since the lone pair is negatively charged (electron), it can attract the partial positive charge of the hydrogen.

Re: Hydrogen Bonds

Posted: Sun Dec 01, 2019 8:30 pm
by Ariana Iranmahboub1G
Hydrogen bonds are only present between hydrogen atoms and nitrogen, oxygen, or fluorine. For this reason, only lone pairs on N, O, or F can be able to form a hydrogen bond as no other atom can.