Hydrogen bonding:
The scientist in the year 1920, named Rodebush and Latimer mentioned the idea of "hydrogen bond".
For the making of H-bonding the molecule should have an atom of high electronegativity similar to F, O and N bonded to the hydrogen atom and the size of an electronegative atom should be fairly small.
Types of hydrogen bonding:
A) Intermolecular hydrogen bond:
The Intermolecular hydrogen bond builds up among two distinct molecules of similar or distinct substances.
(a) Hydrogen bond among the molecules of hydrogen fluoride.
(b) The Hydrogen bond in the water molecules and alcohol.
(B) The Intramolecular hydrogen bond (Chelation):
The Intramolecular hydrogen bond builds up among the hydrogen atom and the highly electronegative atom (like F, O and N) existed in the similar molecule. The Intramolecular hydrogen bond outcomes in cyclisation of the molecules and saves it from their association. As an outcome, the effect of the intramolecular hydrogen bond on the physical properties is fairly negligible.
For illustration:
The Intramolecular hydrogen bonds are existed in the molecules like o-nitrobenzoic acid, o-nitrophenol, and so forth.
The level of the intramolecular and intermolecular hydrogen bonding both based on temperature.
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