N
N
TiCl 2
2
R
R 4
R 5
R 2
R 3
X
N
Ti
Cl
Cl
Ti
O
Cl
Cl
X
Zr Cl
Cl
R 2
R 3
R 4
R 5
R 6
R 7
R 6
R 5
R 4
R 7
R 3
R 2
X
Zr
Cl
Cl
R 3
R 2
R 7
X
Zr Cl
Cl
R 2
R 2
R 5
R 5
X= CH 2 -CH 2 , (CH 3 ) 2 Si, (Ph) 2 C, CH 2 , CH 3 CH
Ln
THF
SiMe 3
SiMe 3
R 5
R 3
R 4
R 1
R 2
N
O
Ni
R
R
L
R
O
Pd
P
Z
L
R
R
R
R
R = Me, Ph, Bn, etc
L = py, lu, DMSO, PR 3
R = Me,
i Pr,
t
Bu, Ph, CF 3, (CH 3 ) 2 C
Z = SO 3
- M
+
Fig. 1 Examples of metal catalysts that can homo- or copolymerize cyclic olefins and
functionalized norbornenes
X
N OH
:
N COOMe :
N CH2OH :
N OAc
:
N CH2OAc :
N COOH :
COO t Bu
COO t Bu
COO
t
Bu
O
O
O
N
O
O
n Bu
X = OH
X = COOMe
X = CH 2 OH
X = OAc
X = CH 2 OAc
X = COOH
DCPD
TCD
HCHD
Fig. 2 Examples of cyclic olefins and functionalized norbornenes that can be homo- or
copolymerized by transition metal catalysts
Polyolefins with Cyclic Comonomers
119