Dipole Moment Amount of electrical charge x bond length. ● Charge separation shown by electrostatic potential map (EPM). Red indicates a partially negative region and blue indicates a partially positive region. H c H => H chloromethane chloromethane Copyright005 Pearso Prentice Hall,Inc 12Chapter 1 12 Dipole Moment • Amount of electrical charge x bond length. • Charge separation shown by electrostatic potential map (EPM). • Red indicates a partially negative region and blue indicates a partially positive region. =>