CHEM 2E03 Chapter Notes - Chapter 8: Alkane Stereochemistry, Alkane, Alkene
Document Summary
Beta elimination (1,2-elimination): a proton from the beta position is removed together with the leaving group, forming a double bond: can be accomplished with any good leaving group. Dehydrohalogenation: when the leaving group is specifically a halide. Alkenes are key feedstocks for the chemical industry. 700 billion pounds of propene and 200 billion pounds of ethane made from petroleum each year. Identify the parent chain, which should include the c=c double bond. Identify and name any substituents: assign a locant (and prefix if necessary) to each substituent. Give the c=c double bond the lowest number possible. List the numbered substituents before the parent name in alphabetical order. Ignore prefixes (except iso) when ordering alphabetically: the c=c bond locant is laced either just before the parent name, or just before the ene suffix. Alkenes are calssified by their degree of substitution: the number of alkyl groups connected to a double bond.
