The Properties Of The Alkenes Flashcards
Are alkenes saturated or unsaturated hydrocarbons?
They are unsaturated.
What is the general formula of aliphatic alkenes?
CnH2n
Can alkenes be cyclic?
Yes
How many electrons does each carbon atom have in its outer shell?
4
How many electrons in each carbon atom of the double bond are involved in the sigma bond?
3
What happens to the final carbon outer shell electron in a double bond?
It becomes part of a Pi bond.
What type of sub shell is the final outer electron in a carbon atom from a double bond in?
A p sub shell
What is a Pi bond formed by?
The overlap of two p orbitals, one from each carbon atom involved in the double bond.
Where is the Pi electron density located?
Above and below the line joining the nuclei of the bonding atoms together.
How does the Pi bond affect the movement of the carbon atoms?
It holds the carbon atoms in a fixed position and therefore, they cannot rotate around the double bond.
What is the molecular shape about a double bond?
It is trigonal planar
How many regions of electron density are there around each carbon atom in a double bond?
3
Where are the regions of electron density located on a carbon atom with a double bond?
Above and below with the Pi bond.
In the middle with the sigma bond.
What is the bond angle about each carbon atom in a double bond?
120 degrees
At what plane are the atoms in the double bond?
They are in the same plane.
