Synthesis of C2 and Cs symmetric zinc complexes supported by bis(phosphinimino)methyl ligands and their use in ring opening polymerisation catalysis

2002 ◽  
pp. 4694-4702 ◽  
Author(s):  
Michael S. Hill ◽  
Peter B. Hitchcock
Keyword(s):  
Ring Opening ◽  
Zinc Complexes

scholarly journals Ring-Opening Copolymerization of Cyclohexene Oxide and Cyclic Anhydrides Catalyzed by Bimetallic Scorpionate Zinc Catalysts

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1651
Author(s):  
Felipe de la Cruz-Martínez ◽  
Marc Martínez de Sarasa Buchaca ◽  
Almudena del Campo-Balguerías ◽  
Juan Fernández-Baeza ◽  
Luis F. Sánchez-Barba ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Mechanism ◽  
Catalytic System ◽  
Phthalic Anhydride ◽  
Ring Opening ◽  
High Selectivity ◽  
Zinc Complexes ◽  
Cyclohexene Oxide ◽  
Reaction Conditions ◽  
Cyclic Anhydrides

The catalytic activity and high selectivity reported by bimetallic heteroscorpionate acetate zinc complexes in ring-opening copolymerization (ROCOP) reactions involving CO2 as substrate encouraged us to expand their use as catalysts for ROCOP of cyclohexene oxide (CHO) and cyclic anhydrides. Among the catalysts tested for the ROCOP of CHO and phthalic anhydride at different reaction conditions, the most active catalytic system was the combination of complex 3 with bis(triphenylphosphine)iminium as cocatalyst in toluene at 80 °C. Once the optimal catalytic system was determined, the scope in terms of other cyclic anhydrides was broadened. The catalytic system was capable of copolymerizing selectively and efficiently CHO with phthalic, maleic, succinic and naphthalic anhydrides to afford the corresponding polyester materials. The polyesters obtained were characterized by spectroscopic, spectrometric, and calorimetric techniques. Finally, the reaction mechanism of the catalytic system was proposed based on stoichiometric reactions.

scholarly journals New zinc complexes derived from “self-adaptable” acyclic diiminodipyrromethanes as potent catalysts for the reduction of curing temperature of bisphenol-A/F benzoxazines

RSC Advances ◽  
2020 ◽  
Vol 10 (60) ◽  
pp. 36275-36286
Author(s):  
Shiva K. Loke ◽  
Eswar Pagadala ◽  
S. Devaraju ◽  
V. Srinivasadesikan ◽  
Ravi K. Kottalanka
Keyword(s):  
Bisphenol A ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes ◽  
The Self ◽  
Curing Temperature ◽  
Schiff’S Bases ◽  
Schiff's Bases

The present work utilized the “self-adaptable” acyclic diiminodipyrromethane Schiff's bases (2a and 2b) for the synthesis of their Zn-based complexes and explored their potential in the ring-opening polymerization of BA-a and BF-a benzoxazines.

Anilido-imine zinc complexes: Efficient catalysts for ring-opening polymerization of L-lactide

2013 ◽  
Vol 29 (1) ◽  
pp. 48-50 ◽  
Author(s):  
Wei Yao ◽  
Ning Cui ◽  
Ying-zhao Xue ◽  
Tian-tian Liu ◽  
Yan Wang
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes

Bimetallic and trimetallic zinc amino-bis(phenolate) complexes for ring-opening polymerization of rac-lactide

2019 ◽  
Vol 48 (36) ◽  
pp. 13699-13710 ◽  
Author(s):  
Yi Liu ◽  
Louise N. Dawe ◽  
Christopher M. Kozak
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes ◽  
Lactide Polymerization

Di- and trinuclear zinc complexes of an amino-bis(phenolate) ligand show good lactide polymerization activity in both solution and melt.

Improvement in zinc complexes bearing Schiff base in ring-opening polymerization of ε-caprolactone: A five-membered ring system

Polymer ◽  
2019 ◽  
Vol 182 ◽  
pp. 121812 ◽  
Author(s):  
Feng-Jie Lai ◽  
Li-Ling Chiu ◽  
Chieh-Ling Lee ◽  
Wei-Yi Lu ◽  
Yi-Chun Lai ◽  
...  
Keyword(s):  
Schiff Base ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Ring System ◽  
Membered Ring ◽  
Zinc Complexes

scholarly journals New Challenge for Classics: Neutral Zinc Complexes Stabilised by 2,2’-Bipyridine and 1,10-Phenanthroline and Their Application in the Ring-Opening Polymerisation of Lactide

2009 ◽  
Vol 1 (4) ◽  
pp. 1226-1239 ◽  
Author(s):  
Janna Börner ◽  
Ulrich Flörke ◽  
Artjom Döring ◽  
Dirk Kuckling ◽  
Matthew Jones ◽  
...  
Keyword(s):  
Ring Opening ◽  
Zinc Complexes

Hybrid Scorpionate/Cyclopentadienyl Magnesium and Zinc Complexes: Synthesis, Coordination Chemistry, and Ring-Opening Polymerization Studies on Cyclic Esters

2010 ◽  
Vol 49 (6) ◽  
pp. 2859-2871 ◽  
Author(s):  
Andrés Garcés ◽  
Luis F. Sánchez-Barba ◽  
Carlos Alonso-Moreno ◽  
Mariano Fajardo ◽  
Juan Fernández-Baeza ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes ◽  
Cyclic Esters
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