Electrophilic Addition of a Halogen to Alkenes Flashcards
1
Q
What is the first stage of the mechanism?
A
= halogen molecule approaches the alkene
= does not have a permaentn dipole- but double bond is a region of high density
= repels the electron pair of the covalent bond in the halogen
= pair of electroms in the pi bond is attracted to the partial positive halogen molecule forms a covalent bond with the halogen
= breaks the halogen to halogen bond with both electrons going to tje halogen, hetrolytic fission
= forms a bromide ion and a carbon cation intermediate
= the electron pair in the halogen atom is attracted to the electron pair to the carbon cation intermediate, forms a covalwnr bond
= forms a haloalkane