<Tr> <Th> C--C bond </Th> <Th> Molecule </Th> <Th> Bond dissociation energy (kcal / mol) </Th> </Tr> <Tr> <Td> CH − CH </Td> <Td> ethane </Td> <Td> 90 </Td> </Tr> <Tr> <Td> C H − CH </Td> <Td> toluene </Td> <Td> 102 </Td> </Tr> <Tr> <Td> C H − C H </Td> <Td> biphenyl </Td> <Td> 114 </Td> </Tr>

How many electrons are in a single double and triple bond