可极化性，极化率 London Dispersion Forces and Polarizability Polarizability:is the ease with which the charge distribution in a molecule can be distorted to give a momentary dipole. 扭曲，变形 Higher Polarizabilitymore easier to induce momentary dipoles the stronger dispersion forces. Polarizability increases with: Melting points of similar non-polar compounds -the greater number of electronsj --the more diffuse electron cloud; Compounds Melting points(C。) CH -182.5 CF -150.0 -23.0 Dispersion forces usually CCl4 90 increases with molar mass. CBr4 CI4 171.0London Dispersion Forces and Polarizability Polarizability: is the ease with which the charge distribution in a molecule can be distorted to give a momentary dipole. Higher Polarizability Higher Polarizability → more easier to induce momentary dipoles → the stronger dispersion dispersion forces. forces. Polarizability increases with: Melting points of similar non-polar 可极化性，极化率 扭曲，变形 Polarizability increases with: -- the greater the greater number of electrons; --the more diffuse electron cloud; the more diffuse electron cloud; Dispersion forces usually increases with molar mass. Compounds Melting points (C°) CH 4 -182.5 CF 4 -150.0 CCl 4 -23.0 CBr 4 90 CI 4 171.0 Melting points of similar non-polar compounds