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Ethane (/ËÉÎ¸eÉªn/ or /ËiËÎ¸eÉªn/) is an organic chemical compound with chemical formula C 2 H 6. At standard temperature and pressure, ethane is a colorless, odorless gas.Ethane is isolated on an industrial scale from natural gas, and as a byproduct of petroleum refining.he name ethane is derived from the IUPAC nomenclature of organic chemistry. Eth- refers to the presence of 2 carbon atoms, and -ane refers to the presence of a single bond between them.
Benzene is the simplest aromatic compound with C6H6 molecular formula and contains three pi bonds arranged in alternate manner in hexagonal ring. The carbon-carbon bond length in benzene is intermediate to C-C single bond (154 pm) and C = C double bond (134 pm) that is 139 pm due to resonance in molecule.ince six pi electrons are delocalized over whole ring, therefore the cyclically conjugated double bonds represents by a circle and the carbon-carbon bond length becomes equal. This structure of benzene is called as resonance hybrid of benzene and generally used to represents the benzenemolecule.