Is an organic ring compound that is often shown having alternating single and double bonds These bonds all have the same bond energies?

Answer 1

Take Benzene as an example. It has 6 carbon atoms which forms aromatic ring.

According to the molecular formula of benzene, it is known that 8 hydrogen atoms are lesser than the saturated alkane. In saturation a mole of benzene needed only 3 mol of hydrogen and it gives the conclusion that it has 3 unsaturated bonds with a ring-structure. Kekule was the first to propose a structure for benzene with alternating single and double bonds.

But later experiments show that the distance between any consecutive C atoms in benzene are the same. So it is often interpreted as resonance structure as a drawn alternate bond model with its mirror image.

But the accepted structure is different from this interpretation. According to it the 6 C atoms are sp2 hybridized, and has a p orbital remaining (as in graphite) and all of them overlap and form molecular orbitals which contains delocalized electrons and this ring is responsible for the aromatic characteristics. As the molecule is symmetrical, all C-C bonds are with equal energy.

Answer 2

The compound is likely a benzene ring. Benzene's structure consists of alternating single and double bonds (resonance) and all the bonds have the same energy due to delocalization of the electrons. This results in a stable aromatic compound.