DF6: Alkenes- versatile compounds

What is an alkene?

unsaturated hydrocarbons

How are alkenes named?

1. Identify the longest chain and use the appropriate prefix to indicate the number of carbon atoms.

2. Follow the prefix with 'ene' to indicate the compound is an alkene.

3. For alkenes with longer chains or branched chains, indicate the position of the double bond using the lowest number possible.

4. For cyclic alkenes, use the prefix cyclo- (e.g., cyclohexene).

What is the general formula of alkenes?

CnH2n

what are electrophiles?

positive ion or molecule with partial positive charge that is attracted to a negatively charged region and will react by accepting a lone pair of electrons to form a covalent bond

What is electrophilic addition?

reaction where an electrophile reacts with an alkene's electron-rich double bond to form a single larger molecule

Describe the reaction of ethene with bromine.

How many pi/sigma bonds in a single bond?

1 sigma bond

Sigma bonds occur when

two wlwctrons