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Copyright © 2017 Pearson Education, Inc.
CHAPTER 7
The Reactions of Alkynes • An Introduction to Multistep Synthesis
Important Terms
acetylide ion
the conjugate base of a terminal alkyne.
−
RC C
aldehyde
a compound with a carbonyl group that is bonded to an alkyl group and to a hydro-
gen (or bonded to two hydrogens).
O
C
R H
or
O
C
H H
alkylation reaction
a reaction that adds an alkyl group to a reactant.
alkyne
a hydrocarbon that contains a triple bond.
carbonyl group
a carbon doubly bonded to an oxygen.
O
C
enol
an alkene with an OH group bonded to one of the
sp
2
carbons.
OH
C
geminal dihalide
a compound with two halogen atoms bonded to the same carbon.
internal alkyne
an alkyne with its triple bond not at the end of the carbon chain.
keto–enol tautomers
a ketone or an aldehyde and its isomeric enol. The keto and enol tautomers differ
only in the location of a double bond and a hydrogen.
R
RCH
OH
C
R
RCH
2
O
C
keto
enol
ketone
a compound with a carbonyl group that is bonded to two alkyl groups.
O
C
R
R
p
-complex
a complex formed between an electrophile and a triple bond.