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(Arylimido)vanadium(V)-Alkylidene Complexes as Catalysts for Ring-opening Metathesis Polymerization (ROMP) of Cyclic Olefins: Ligand Design for Exhibiting the High Activity
FEATURE ARTICLE | Updated：2021-02-18
|
(Arylimido)vanadium(V)-Alkylidene Complexes as Catalysts for Ring-opening Metathesis Polymerization (ROMP) of Cyclic Olefins: Ligand Design for Exhibiting the High Activity
- Chinese Journal of Polymer Science Vol. 37, Issue 10, Pages: 943-950(2019)
- Affiliations：
Department of Chemistry Graduate School of Science, Tokyo Metropolitan University, Japan
- Author bio：
ktnomura@tmu.ac.jp
- Funds：
DOI：10.1007/s10118-019-2298-9
CLC：Received：05 May 2019，
Revised：2019-5-17，
Accepted：17 May 2019，
Online First：28 June 2019，
Published：2019-10
- Accepted：
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Nomura, K.; Chaimongkolkunasin, S. (Arylimido)vanadium(V)-alkylidene complexes as catalysts for ring-opening metathesis polymerization (ROMP) of cyclic olefins: Ligand design for exhibiting the high activity. Chinese J. Polym. Sci. 2019, 37, 943–950.
Kotohiro Nomura, Sapanna Chaimongkolkunasin. (Arylimido)vanadium(V)-Alkylidene Complexes as Catalysts for Ring-opening Metathesis Polymerization (ROMP) of Cyclic Olefins: Ligand Design for Exhibiting the High Activity[J]. Chinese Journal of Polymer Science, 2019, 37(10): 943-950.
Nomura, K.; Chaimongkolkunasin, S. (Arylimido)vanadium(V)-alkylidene complexes as catalysts for ring-opening metathesis polymerization (ROMP) of cyclic olefins: Ligand design for exhibiting the high activity. Chinese J. Polym. Sci. 2019, 37, 943–950. DOI： 10.1007/s10118-019-2298-9.
Kotohiro Nomura, Sapanna Chaimongkolkunasin. (Arylimido)vanadium(V)-Alkylidene Complexes as Catalysts for Ring-opening Metathesis Polymerization (ROMP) of Cyclic Olefins: Ligand Design for Exhibiting the High Activity[J]. Chinese Journal of Polymer Science, 2019, 37(10): 943-950. DOI： 10.1007/s10118-019-2298-9.
(Arylimido)vanadium(V)-Alkylidene Complexes as Catalysts for Ring-opening Metathesis Polymerization (ROMP) of Cyclic Olefins: Ligand Design for Exhibiting the High Activity
摘要
Abstract
(Imido)vanadium(V)-alkylidene complexes of type V(CHSiMe
3
)(NR)(ORʹ)(PMe
3
)
2
[R = Ad
C
6
H
5
2
6-Me
2
C
6
H
3
2
6-Cl
2
C
6
H
3
; Rʹ = 2
6-Me
2
C
6
H
3
2
6-
i
Pr
2
C
6
H
3
2
6-F
2
C
6
H
3
C
6
F
5
C
6
Cl
5
] exhibited from moderate to remarkable catalytic activities for ring-opening metathesis polymerization (ROMP) of norbornene (NBE). The catalytic activities were affected by the ligand substituents
and V(CHSiMe
3
)(N-2
6-Cl
2
C
6
H
3
)(OC
6
X
5
)(PMe
3
)
2
(X ＝ F
Cl) demonstrated the exceptionally high catalytic activities for ROMP of NBE. The complexes polymerized cycloheptene (CHPE) and
cis
-cyclooctene (COE)
and ROMP of COE by the OC
6
Cl
5
analogue proceeded in a living manner even at 80 °C
and the activity increased with increasing the temperature up to 120 °C. Highly active catalysts for ROMP of cyclic olefins (NBE
cyclopentene
and CHPE) can be generated
in situ
by premixing isolated V(CHSiMe
3
)(NC
6
F
5
)(O-2
6-
i
Pr
2
C
6
H
3
)(PMe
3
)
2
with 1.0 equiv. of C
6
F
5
OH or C
6
Cl
5
OH
via
immediate phenoxy exchange; the activity was affected by the kind of phenol added [TOF in the ROMPs of NBE: 4.62 × 10
4
min
–1
(upon addition of C
6
F
5
OH) versus 37.3 min
–1
(none)].
关键词
Keywords
references
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