which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes? identify the longest…

which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes? identify the longest chain of carbon atoms. examine the multiple bond for cis - and trans - isomers. number the chain of carbons, starting with the end nearest the multiple bond. add a number prefix indicating the first carbon atom in the multiple bond.

which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes? identify the longest chain of carbon atoms. examine the multiple bond for cis - and trans - isomers. number the chain of carbons, starting with the end nearest the multiple bond. add a number prefix indicating the first carbon atom in the multiple bond.

Answer

Brief Explanations:

Alkenes can have cis - and trans - isomers due to the restricted rotation around the double bond. Alkynes have a triple bond and linear geometry, so they do not have cis - trans isomerism. Identifying longest chain, numbering the chain starting from end nearest to multiple bond and adding number prefix indicating first carbon in multiple bond are common steps for both alkenes and alkynes.

Answer:

Examine the multiple bond for cis - and trans - isomers.