I1 Aromaticity and Reactivity Each carbon contributes a p orbital Six p orbitals overlap to give cyclic p system; Six p electrons delocalized throughout p system High electron density above and below plane of ringCollege of Science I1 Aromaticity and Reactivity „Each carbon contributes a Each carbon contributes a p orbital orbital „Six p orbitals orbitals overlap to give overlap to give cyclic p system ; „Six p electrons electrons delocalized delocalized throughout throughout p system „High electron density High electron density above and below plane of above and below plane of ring