Chapter 12

common name for Ethyne (alkyne)

Acetylene

what is the simplest alkene?

Ethene (AKA Ethylene)

common name for Ethene (alkene)

Ethylene

Cis-Trans Isomers

have the same formula, but different physical and chemical properties.

What kind of arrangement does alkynes have?

linear arrangement -triple bond that forms when two carbon atoms share three pairs of valence electrons

Some Alkenes have cis-trans isomers because

the carbon atoms in the double bond cannot rotate

Alkenes and Alkynes are called unsaturated compounds

they have fewer hydrogen atoms attached to the carbon chain than alkanes.

why doe Cis-Trans isomers occur?

they occur because double bonds in alkenes are rigid and cannot rotate.

What kind of arrangement does Alkenes have?

trigonal planar arrangement around the double bonded carbon atoms