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Unformatted text preview: covalent molecules containing H directly attached to one of the three small electronegative elements: O, N, or F. DIPOLE-DIPOLE INTERACTIONS: These are strong interactions that occur between polar covalent molecules. They are due to the attraction of the + atoms of one molecule to the -atoms of another molecule. DISPERSION FORCES (LONDON FORCES): Very week attractive forces between short lived temporary dipoles. They are present for all types of molecules. They are the ONLY type of intermolecular forces for non-polar substances. Dispersion forces result from the attraction of the positively charged nucleus of one atom for the electron cloud of an atom in nearby molecules. This induces temporary dipoles in neighboring atoms or molecules. THEY ARE GENERALLY STRONGER FOR MOLECULES THAT ARE LARGE!!...
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- Spring '11