Chemistry Reference
In-Depth Information
and
F
F
N
N
N
N
N
n
n
+
N
N
N
N
N
F
F
F
F
N
N
N
N
N
N
n
F
F
By this condensation, high molecular weight polymers can form [
200
]. They decompose near
500
C in air or in nitrogen atmosphere.
Cyclopentadienone derivatives condense by the Diels-Alder reaction in homopolycycloaddition.
The reactions involve a series of steps consisting of initial cycloaddition, followed by loss of carbon
monoxide through an expulsion of a bridge carbonyl group [
201
]:
O
AlBr
3
CS
2
Br
C
O
O
N-bromosuccinimide
CCl
4
+
Br
C
O
O
Br
O
KI
acetone
(
C
6
H
5
CH
2
)
2
CO
base
Br
O
O
O
O
C
O
