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.
Double bond - Double bonds in alkenes. 1  The type of bonding can be explained in terms of orbital hybridization. 2  With 133 pm, the ethylene C=C bond length is shorter than the CâC length in ethane with 154 pm. 3  In an alternative representation, the double bond results from two overlapping sp3 orbitals as in a bent bond. [3]