<Tr> <Td> trans - 1, 2 - dichlorocyclohexane </Td> <Td> cis - 1, 2 - dichlorocyclohexane </Td> </Tr> <P> Cis and trans isomers often have different physical properties . Differences between isomers, in general, arise from the differences in the shape of the molecule or the overall dipole moment . </P> <Table> <Tr> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> cis - 2 - pentene </Td> <Td> trans - 2 - pentene </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> cis - 1, 2 - dichloroethene </Td> <Td> trans - 1, 2 - dichloroethene </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> cis - butenedioic acid (maleic acid) </Td> <Td> trans - butenedioic acid (fumaric acid) </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Oleic acid </Td> <Td> Elaidic acid </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> </Td> </Tr>

Cis and trans isomers are one type of constitutional isomer