Hydrogen bonding is of two types - t Intramolecular and intermolecular Am I right ?

1 Answer
Truong-Son N.
Aug 24, 2017

Nope. It is only intermolecular.

It is just a misnomer that we call it "hydrogen-bonding". Yes, the hydrogen is bonded within the molecule, but the term "hydrogen-bonding" does not refer to that.

https://upload.wikimedia.org/

It refers to the polarizing interaction with an electronegative atom on another molecule, which strictly speaking, is a significantly weaker interaction than in a regular bond.

This interaction is...

the polarization of electron density from an adjacent molecule's #H# atom by an electronegative-enough atom.

Often we speak of #"O"#, #"N"#, and #"F"# NOT bonded to the #"H"# in question as being hydrogen-bond acceptor atoms. The electronegative atom BONDED to the #"H"# atom is then the hydrogen-bond donor.

Thus, there is particularly noticeable hydrogen-bonding in #"NH"_3#, #"HF"#, and #"H"_2"O"# samples.

It is not, however, restricted to #"N"cdots"H"-"N"#, #"O"cdots"H"-"O"#, and #"F"cdots"H"-"F"# interactions. Chloroform and acetone are also known to weakly hydrogen-bond.

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