Chapter 5 Alkenes Flashcards
Equation for degree of unsaturation
(2c + 2+ N - X - H)/2
What does “c”, “N”, “X” and “H” stand for in degree of unsaturation equation
C = Carbon N = Nitrogen X = Halogen H = Hydrogen
Degree of unsaturation for: Double bond
1 degree
Degree of unsaturation for: Single bond
0 degrees
Degree of unsaturation for: triple bond
2 degrees
Degree of unsaturation for:
Cyclo- groups
1 degree
Alkane
Only single bonds
Alkene
At least one double bond present.
Alkyne
At least 1 triple bond present
Rank priority of Alkane (single), Alkene (Double) and alkyne (triple)
Alkene (double), Alkyne (triple), Alkane (single)
Define: Vinylic carbon
a carbon that is attached to a double bond
Define: Allylic Carbon
A carbon that is 1 away from the double bond
Define: Methylene Carbon
A carbon that is attached to a fully saturated carbon chain.
What is the alkene nomenclature fore a Cis isomer.
Z
What is the alkene nomenclature for a Trans isomer
E
How are priority substituents arranged on a z isomer
cis or same side of the double bond
How are priority substituents arranged on an e isomer
trans or opposite side of the double bond
Classification of a fatty acid
Hydrocarbon chain with polar subsituents
Long carbon chains (12-40)
Define: Triglyceride
A carbon chain with 3 alcohol groups.
Define: Steric acid
An saturated acid
Monounsaturated
only 1 doublebond
How is melting point related to saturation
The higher the degree of unsaturation the lower the melting point.
Why is melting point related to saturation
Molecules are not able to stack on each other when double or triple bonds are present.
