Lecture16-notes

Lecture16 notes

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Unformatted text preview: 10/4/09
 Alkynes
are
hydrocarbons
containing
a
carbon‐carbon
triple
bond.
 The
general
formula
for
an
alkyne
is
CnH2n‐2.
The
first
member
of
the
alkyne
series
is
ethyne
 (acetylene):
 Because
of
the
triple
bond,
alkynes
are
more
reactive
than
alkenes.
 
Alkynes
 Alkynes
are
molecules
containing
a
triple
bond:
 R
 R
 The
triple
bond
consists
of

 
 
one
σ
bond

 R
 sp‐hybridized
carbon
 R
 and
two
π
bonds:
 py
 R
 R
 py
 R
 R
 px
 1
 10/4/09
 
Alkynes
 The
sp‐hybridization
results
in
a

 
 
1800


CCC‐bond
angle
 Consequently,
four
atoms
are
arranged
linearly.
 1
8
0
 H
 H
 C
...
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