Highly Active and Isospecific Styrene Polymerization Catalyzed by Zirconium Complexes Bearing Aryl-substituted [OSSO]-Type Bis(phenolate) Ligands
[OSSO]-type dibenzyl zirconium(IV) complexes 9 and 10 possessing aryl substituents ortho to the phenoxide moieties (ortho substituents, phenyl and 2,6-dimethylphenyl (Dmp)) were synthesized and characterized. Upon activation with dMAO (dried methylaluminoxane), complex 9 was found to promote highly...
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| Series: | Polymers |
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| Online Access: | http://www.mdpi.com/2073-4360/8/2/31 |
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doaj-318f36ebb439445db9c46b85c55011dc2020-11-25T01:07:44ZengMDPI AGPolymers2073-43602016-01-01823110.3390/polym8020031polym8020031Highly Active and Isospecific Styrene Polymerization Catalyzed by Zirconium Complexes Bearing Aryl-substituted [OSSO]-Type Bis(phenolate) LigandsNorio Nakata0Tomoyuki Toda1Yusuke Saito2Takanori Watanabe3Akihiko Ishii4Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, JapanDepartment of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, JapanDepartment of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, JapanDepartment of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, JapanDepartment of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, Japan[OSSO]-type dibenzyl zirconium(IV) complexes 9 and 10 possessing aryl substituents ortho to the phenoxide moieties (ortho substituents, phenyl and 2,6-dimethylphenyl (Dmp)) were synthesized and characterized. Upon activation with dMAO (dried methylaluminoxane), complex 9 was found to promote highly isospecific styrene polymerizations ([mm] = 97.5%–99%) with high molecular weights Mw up to 181,000 g·mmol−1. When the Dmp-substituted pre-catalyst 10/dMAO system was used, the highest activity, over 7700 g·mmol(10)−1·h−1, was recorded involving the formation of precisely isospecific polystyrenes of [mm] more than 99%.http://www.mdpi.com/2073-4360/8/2/31zirconiumpost-metallocenestyrene polymerization[OSSO]-type ligandisotactic |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Norio Nakata Tomoyuki Toda Yusuke Saito Takanori Watanabe Akihiko Ishii |
| spellingShingle |
Norio Nakata Tomoyuki Toda Yusuke Saito Takanori Watanabe Akihiko Ishii Highly Active and Isospecific Styrene Polymerization Catalyzed by Zirconium Complexes Bearing Aryl-substituted [OSSO]-Type Bis(phenolate) Ligands Polymers zirconium post-metallocene styrene polymerization [OSSO]-type ligand isotactic |
| author_facet |
Norio Nakata Tomoyuki Toda Yusuke Saito Takanori Watanabe Akihiko Ishii |
| author_sort |
Norio Nakata |
| title |
Highly Active and Isospecific Styrene Polymerization Catalyzed by Zirconium Complexes Bearing Aryl-substituted [OSSO]-Type Bis(phenolate) Ligands |
| title_short |
Highly Active and Isospecific Styrene Polymerization Catalyzed by Zirconium Complexes Bearing Aryl-substituted [OSSO]-Type Bis(phenolate) Ligands |
| title_full |
Highly Active and Isospecific Styrene Polymerization Catalyzed by Zirconium Complexes Bearing Aryl-substituted [OSSO]-Type Bis(phenolate) Ligands |
| title_fullStr |
Highly Active and Isospecific Styrene Polymerization Catalyzed by Zirconium Complexes Bearing Aryl-substituted [OSSO]-Type Bis(phenolate) Ligands |
| title_full_unstemmed |
Highly Active and Isospecific Styrene Polymerization Catalyzed by Zirconium Complexes Bearing Aryl-substituted [OSSO]-Type Bis(phenolate) Ligands |
| title_sort |
highly active and isospecific styrene polymerization catalyzed by zirconium complexes bearing aryl-substituted [osso]-type bis(phenolate) ligands |
| publisher |
MDPI AG |
| series |
Polymers |
| issn |
2073-4360 |
| publishDate |
2016-01-01 |
| description |
[OSSO]-type dibenzyl zirconium(IV) complexes 9 and 10 possessing aryl substituents ortho to the phenoxide moieties (ortho substituents, phenyl and 2,6-dimethylphenyl (Dmp)) were synthesized and characterized. Upon activation with dMAO (dried methylaluminoxane), complex 9 was found to promote highly isospecific styrene polymerizations ([mm] = 97.5%–99%) with high molecular weights Mw up to 181,000 g·mmol−1. When the Dmp-substituted pre-catalyst 10/dMAO system was used, the highest activity, over 7700 g·mmol(10)−1·h−1, was recorded involving the formation of precisely isospecific polystyrenes of [mm] more than 99%. |
| topic |
zirconium post-metallocene styrene polymerization [OSSO]-type ligand isotactic |
| url |
http://www.mdpi.com/2073-4360/8/2/31 |
| work_keys_str_mv |
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