3.3.4 ALKENEEES

Add bromine water to alkenes and itll turn colourless

1)Pair of electrons from C=C double bond forms bond with X+ atom. Releasing Y- ion WITH LONE PAIR
2)This forms a carbocation
3)Lone pair on Y- ion forms bond with C+ atom

Contains high electron density region attracting electrophiles

Partially positive H is attracted

Alkene gas passed thru concentrated HBR or HBR dissolved in an inert solvent

Electron high density causes temporary polar bond on BR2

Alkene gas passed thru concentrated halogen

Alkene gas passed thru cold concentrated sulphuric acid.

Major is always produced from the more stable carbocation
Minor less

Tertiary = 3 alkyl groups bonded to C+
Secondary = 2 alkyl groups bonded to C+
Primary = 1 alkyl group bonded to C+

Alkyl groups give electron density to C+ making it more stable

High temps/pressure leads to double bond in alkenes to open up

Alkenes which turn into alkanes

Small molecule that fits between polymer chains weakening INFS. Making it more flexible