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(iii) Hydrogen Bonding: Elements of high electronegativity (F, O, N), bonded to a (tiny)
hydrogen atom give rise to a special case of dipole-dipole interaction called H-bonding.
This is important in determining solubility, melting and boiling points, and stability of
crystal structures. Hydrogen bonding also plays an important role in biological systems.
Hydrogen bonded molecules experience stronger hydrogen bonding in addition to van der
Waals’ forces and dipole-dipole interaction.
Strength of bonding: van der Waals’ < dipole-dipole < H-bond << covalent bond ≈ ionic
bond. However, van der Waals’ forces can become extensive depending on the size of the
molecules, e.g., in polymers and long chain hydrocarbon molecules.
2. Ionic bonding occurs as a result of electron transfer from active metals of Groups 1, 2,
3 to active non-metals of Groups 6, 7, leading to electrostatic attracti...
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This note was uploaded on 09/23/2010 for the course CS 001 taught by Professor Jix during the Spring '10 term at Riverside Community College.
- Spring '10