Polarity and reactivity Halogens are more electronegative than c Carbon-halogen bond is polar, so carbon has partial positive charge Carbon can be attacked by a nucleophile Halogen can leave with the electron pair > 6+ h-C-Br Chapter 6Chapter 6 3 Polarity and Reactivity • Halogens are more electronegative than C. • Carbon-halogen bond is polar, so carbon has partial positive charge. • Carbon can be attacked by a nucleophile. • Halogen can leave with the electron pair. => C H H H Br + -