âSorry for the paucity of posts over the past few days but I'm in a state of upheaval known as âjob changeâ.â âThere is no scheme in all these projects to solve the paucity of clean, safe drinking water.â âThe paucity of these qualities in the present Republic would stagger them.â
Benzene is the archetypical aromatic compound. It is planar, bond angles=120Âº, all carbon atoms in the ring are sp2 hybridized, and the pi-orbitals are occupied by 6 electrons. The aromatic heterocycle pyridine is similar to benzene, and is often used as a weak base for scavenging protons.
The actual bond length between each pair of adjacent carbons in the ring is 140 picometers. Thus, each pair of adjacent carbon atoms in benzene has the character of one and a half bonds rather than one or two bonds. To help illustrate this point, benzene is often drawn as a cyclohexane ring with a circle in the middle, which helps show the delocalization of the electrons in the double bonds.