13.1 Properties Of Alkenes Flashcards
What type of hydrocarbons are alkenes?
Unsaturated hydrocarbons
Why are alkenes unsaturated?
They contain at least one Carbon Carbon double bond
General formula for alkenes
CnH2n
What is a pi bond?
A pi bond is caused by the sideways overlap of 2 p orbitals
Electron density is concentrated above and below the line joining the two nuclei of the bonding atoms
Why can the Carbon atoms not rotate around each other in a pi bond?
The pi bond locks the two Carbon atoms in position
The shape around a double bond
3 regions of electron density around each Carbon atom
3 regions repel each other as much as possible
Trigonal planar shape, 120 bond angle
All atoms are in the same plane
How many bonds can a carbon atom form?
4
Outline the 4 bonds that a Carbon atom forms
3 sigma bonds (head on overlap of orbitals)
1 pi bond (sideways overlap of orbitals)
