Novel Ruthenium(II) N-Heterocyclic Carbene Complexes as Catalyst Precursors for the Ring-Opening Metathesis Polymerization (ROMP) of Enantiomerically Pure Monomers: X-ray Structures, Reactivity, and Quantum Chemical Considerations

2007 ◽  
Vol 2007 (25) ◽  
pp. 3988-4000 ◽  
Author(s):  
Michael R. Buchmeiser ◽  
Dongren Wang ◽  
Yan Zhang ◽  
Sergej Naumov ◽  
Klaus Wurst
Keyword(s):  
Quantum Chemical ◽  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Carbene Complexes ◽  
Enantiomerically Pure ◽  
Metathesis Polymerization ◽  
X Ray

Cationic tungsten imido alkylidene N-heterocyclic carbene complexes for stereospecific ring-opening metathesis polymerization of norbornene derivatives

2021 ◽  
Author(s):  
Janis V. Musso ◽  
Mathis Benedikter ◽  
Paul Gebel ◽  
Vincent Gramm ◽  
Dongren Wang ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Carbene Complexes ◽  
Metathesis Polymerization ◽  
Norbornene Derivatives

Cationic W alkylidene N-heterocyclic carbene complexes allow for the stereospecific ring-opening metathesis polymerization of norbornenes with high trans-iso- and high cis-syndiospecificity, respectively.

scholarly journals Synthesis and Ring-Opening Metathesis Polymerization of a New Norbornene Dicarboximide with a Pendant Carbazole Moiety

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Stefania Pragliola ◽  
Antonio Botta ◽  
Rubina Troiano ◽  
Veronica Paradiso ◽  
Fabia Grisi
Keyword(s):  
Ring Opening ◽  
Microstructural Analysis ◽  
Fluorescence Analysis ◽  
Dsc Analysis ◽  
X Ray Diffraction ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
X Ray ◽  
Excimer Formation ◽  
Film Polymer

A new norbornene dicarboximide presenting a pendant carbazole moiety linked by a p-methylene benzyl spacer is synthesized. This carbazole-functionalized monomer is polymerized via ring-opening metathesis polymerization using Grubbs third-generation catalyst. Microstructural analysis of resulting polymers performed by Nuclear Magnetic Resonance (NMR) shows that they are stereoirregular. Wide-angle X-ray diffraction (WAXD) and thermal (DSC) analysis indicate that polymers are also amorphous. With respect to the fluorescence analysis, both solution and film polymer samples exhibit only “normal structured” carbazole fluorescence, while excimer formation by overlap of carbazole groups is not detected.

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