Post on 28-Dec-2015
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Naming Unsaturated Naming Unsaturated HydrocarbonsHydrocarbons
AliphaticAliphatic
AlkenesAlkenes
Alkenes/AlkynesAlkenes/AlkynesAt the conclusion of our time At the conclusion of our time
together, you should be able to:together, you should be able to:
1. Define an alkene2. Name, write and draw various
alkenes/alkynes
EthyleneEthylene
Definitions by B.C.
The IUPAC RulesThe IUPAC Rules
Double bonds are named using an –ene ending.Double bonds are named using an –ene ending.More than one double bond will have a –diene More than one double bond will have a –diene for two, –triene for three, etc. for two, –triene for three, etc. Double or triple bonds are given priority for the Double or triple bonds are given priority for the lowest numbers before substituent groups.lowest numbers before substituent groups.The longest chain must include the double bond.The longest chain must include the double bond.
Naming AlkenesNaming Alkenes
Alkene NomenclatureAlkene Nomenclature
The Scientific Methodbegins with
Questions about the World Around You.
Ever Wonder Why?...
you drive on a parkway and park on a driveway?
PolyenesPolyenes
Name These AlkenesName These Alkenes
3,4,4-trimethylpentene
3,4,4-trimethylpenta-1-ene
3-methyl-3-hexene
3-methylhexa-3-ene
4,7-dimethyl-2,5-octadiene
4,7-dimethylocta-2,5-diene
You Might Be a Redneck If…
Your wife can climb a tree faster than your cat.
You have a complete set of salad bowls and they all say "Cool Whip" on the side.
Naming Unsaturated Naming Unsaturated HydrocarbonsHydrocarbons
AliphaticAliphatic
AlkynesAlkynes
Euphemisms in Science We all know that some politicians and
government spokesmen use certain euphemistic phrases to give an aura of respectability to
descriptions of events or actions which would be offensive when expressed in plain English. The following is a list of Euphemisms in Science and
their translations into plain English.
“These results will be reported at a later date...”
I may get around to this!
The IUPAC RulesThe IUPAC Rules
Triple bonds are named using an –yne ending.Triple bonds are named using an –yne ending.More than one triple bond will have a –diyne for More than one triple bond will have a –diyne for two, –triyne for three, etc. two, –triyne for three, etc. Double or triple bonds are given priority for the Double or triple bonds are given priority for the lowest numbers before substituent groups.lowest numbers before substituent groups.The longest chain must include the triple bondThe longest chain must include the triple bond
Alkyne NomenclatureAlkyne Nomenclature
Hexyne
2-hexyne
3-hexyne
Alkenes/AlkynesAlkenes/AlkynesLet’s see if you can:Let’s see if you can:
1. Define an alkene2. Name, write and draw various
alkenes/alkynes
Name These Alkenes/Alkynes from Name These Alkenes/Alkynes from Page 25:6Page 25:6
C
C
C
Name These Alkenes/Alkynes from Name These Alkenes/Alkynes from Page 26:4Page 26:4
1. Longest chain = Cyclohexene
2. Lowest number for –ene, therefore, start from lower right corner and go counterclockwise
3. Methyl and propyl at
4. 3 position
5. Methyl is first in the alphabet
6. 3 – methyl – 3 – propylcyclohexene
Little Known Phobias!
Charminophobia
Fear of being squeezed
The IUPAC RulesThe IUPAC Rules
Double bonds are named using an –ene ending.Double bonds are named using an –ene ending.More than one double bond will have a –diene More than one double bond will have a –diene for two, –triene for three, etc. for two, –triene for three, etc. Double or triple bonds are given priority for the Double or triple bonds are given priority for the lowest numbers before substituent groups.lowest numbers before substituent groups.The longest chain must include the double bond.The longest chain must include the double bond.