Nomenclature 2

Alkenes, Alkynes, Benzine Derivatives

Alkene — find longest carbon chain containing ___ of the alkene

both carbons

Alkene — start chain numbering at

the alkene

Alkene — start numbering from the end that gives the alkene carbons the ____ possible numbers

lowest

Alkene — parent ending changes to

—ene

Alkene — when naming parent chain, include numbering of ___

lower alkene C

Alkene — name structure

substituents - alkene C# - parent

When more than 1 alkene in parent

C#, C# - __diene

Cyclic alkene — double bond in ring is always

C1 and C2

Common naming for Alkynes — name ___ alphabetically, followed by __

substituents, acetylene

IUPAC naming of Alkynes —

lowest number to alkynes, change ending to —yne

Multiple Alkynes —

C#, C# - __ diyne (prefix based on number of -ynes)

En-yne

alkene and alkyne in a chain

En-yne — number from end that gives the ___ the lowest number

first unsaturation (double, triple, cyclic bond)

En-ynes — if numbering yields same results in both directions, start numbering to give the ___ the lowest number

alkene

En-yne name structure

substituents - parent prefix - C# - ene - C# - yne

Benzine derivatives — monosubstituted

substituent + benzine

Benzine derivative — if C chain has more C than the ring, the ring is a ___

phenyl sub

Benzine — ortho

substituents on adjacent carbons (ie 1,2 - dimethyl)

Benzine — meta

sub’s are 2 C apart (ie 1,3 - dimethyl)

Benzine — para

sub’s are on opposite side of ring (ie 1,4 - dimethyl)

Di or Poly-subbed benzene parent

benzine or common derivative

Di or Poly-subbed benzene sub numbering

lowest possible numbering — if common derivative is present, its associated sub MUST be C1

Di or Poly-subbed benzene name structure

subs alphabetically - parent name