alkene

Question 1

describe two fact about alkenes

Answer 1

double carbon bond consists of pi bon and a sigma bond

it is unsaturated

Question 2

when does E-Z isomerism occur

Answer 2

1.there is a restricted rotation around the double carbon bond
2.There are two different group on both ides of the double bond

Question 3

what is a priority group

Answer 3

The atom with the bigger
atomic number is classed as the priority atom

Question 4

what i an electrophile

Answer 4

an electron pair acceptor

Question 5

describe the conditions for electrophillic substitution of Br2

Answer 5

Reagent: Bromine
Conditions: Room temperature (not in UV light)
Mechanism: Electrophilic addition
Type of reagent: Electrophile, Brðd

Question 6

describe reaction of bromine

Answer 6

As the Br2 molecule
approaches the alkene,
the pi bond electrons
repel the electron pair in
the Br-Br bond.

This induces a dipole. Br2 becomes polar and
electrophilic (Brδ+.

alway forms a di halogenoalkane