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van der Waals force
(redirected from Van der Waals bond)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
van der Waals force [′van dər ‚wȯlz ‚fȯrs]
(physical chemistry)
An attractive force between two atoms or nonpolar molecules, which arises because a fluctuating dipole moment in one molecule induces a dipole moment in the other, and the two dipole moments then interact. Also known as dispersion force; London dispersion force; van der Waals attraction.


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Two model examples--hexamethylbenzene, a centrosymmetric crystal with both covalent and Van der Waals bonds, and anhydrous alum, a nocentrosymmetric structure typical of ceramics and metals--are chosen as model crystals and used to explain symmetry, point groups, space groups, Bravais lattices, reciprocal lattices, and diffraction maxima.
Since van der Waals bonds are weaker than covalent and hydrogen bonds, the breaking of van der Waals bonds occurs in relatively low stress field.
Each seta's tip branches into even finer hairs that nestle so closely with every surface the gecko touches that intermolecular attractions called van der Waals bonds and capillary forces kick in.
 
 
 
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