Hydrogen Bonding

        Hydrogen Bonding

Type of H-Bonding, Modern Concept of Covalent Bonding


In formed when H-atom of one molecules combines with the electronegative atom of other molecule by dipole-dipole interaction (N, O, F and  electron cloud exhibit H-bonding)

Type of H-Bonding

  1. Intermolecular H-Bonding: Formed between H and electronegative element of two different or same molecule



    It increase the boiling point, solubility in water and viscosity.
     
  2. Intramolecular hydrogen bonding: Formed between H and electronegative element present in the same molecule.


     
  3. It increases volatile nature, decreases boiling point and solubility.

Modern Concept of Covalent Bonding

Valence bond theory: Formed by overlapping of half filled atomic orbitals.

Main Characters:

  1. Greater the overlapping higher the strength of the bond.
  2. Electron density is maximum between the two atom where overlapping takes place.
  3. p-orbitals will form stronger bond than s-orbital.
  4. When overlapping of orbital takes place along their axis the bond formed is(sigma) bond.
  5. When overlapping of orbital takes place laterally or sidewise the bond formed isbond.


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