key terms Flashcards
1
Q
define alkene
A
unsaturated hydrocarbon
2
Q
general formula
A
CnH2n
3
Q
what reaction do alkenes undergo?
A
electrophilic addition
4
Q
define electrophilic addition
A
an addition reaction where alkenes form saturated alkanes
5
Q
why are alkenes more reactive than alkanes?
A
the double carbon bond has a high electron density in the pi bond that is open to attack from electrophiles which makes it very reactive
6
Q
describe sigma bonds
A
- single covalent
- s orbitals overlap
- high bond enthalpy
- very strong
7
Q
describe pi bonds
A
- double covalent
- p orbitals overlap sideways
- lower electron density as they spread above and below
- lower bond enthalpy
- weaker
