scholarly journals Polynuclear alkoxy–zinc complexes of bowl-shaped macrocycles and their use in the copolymerisation of cyclohexene oxide and CO2

2019 ◽  
Vol 48 (15) ◽  
pp. 4887-4893 ◽  
Author(s):  
James R. Pankhurst ◽  
Shyeni Paul ◽  
Yunqing Zhu ◽  
Charlotte K. Williams ◽  
Jason B. Love
Keyword(s):  
Carbon Dioxide ◽  
Ring Opening ◽  
Zinc Complexes ◽  
Cyclohexene Oxide

Tri- and tetranuclear macrocyclic zinc alkoxides act as catalysts for the ring-opening polymerisation of epoxides and carbon dioxide.

Ring-opening copolymerisation of cyclohexene oxide and carbon dioxide catalysed by scorpionate zinc complexes

2016 ◽  
Vol 7 (42) ◽  
pp. 6475-6484 ◽  
Author(s):  
Javier Martínez ◽  
José A. Castro-Osma ◽  
Agustín Lara-Sánchez ◽  
Antonio Otero ◽  
Juan Fernández-Baeza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ring Opening ◽  
Zinc Complexes ◽  
Cyclohexene Oxide

New bimetallic heteroscorpionate zinc complexes have been developed and used as efficient catalysts for the synthesis of poly(cyclohexene carbonate).

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 Ti(IV)–Tris(phenolate) Catalyst Systems for the Ring-Opening Copolymerization of Cyclohexene Oxide and Carbon Dioxide

2020 ◽  
Vol 39 (9) ◽  
pp. 1619-1627 ◽  
Author(s):  
Sumesh K. Raman ◽  
Arron C. Deacy ◽  
Leticia Pena Carrodeguas ◽  
Natalia V. Reis ◽  
Ryan W. F. Kerr ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ring Opening ◽  
Cyclohexene Oxide ◽  
Catalyst Systems

New Derivatives of Quinoxaline – Syntheses, Complex Formation and their Application as Controlling Ligands for Zinc Catalyzed Epoxide-CO2–Copolymerization

2002 ◽  
Vol 57 (8) ◽  
pp. 946-956 ◽  
Author(s):  
O. Hampel ◽  
C. Rode ◽  
D. Walther ◽  
R. Beckert ◽  
H. Görls
Keyword(s):  
Carbon Dioxide ◽  
Complex Formation ◽  
Zinc Complexes ◽  
Zinc Ions ◽  
Cyclohexene Oxide ◽  
Analogous Manner ◽  
Type 3 ◽  
High Degree ◽  
Derivatives Of

A series of amino-(type 3) as well as hydrazino-substituted quinoxalines (type 8) have been synthesized in order to study their ability to complex with iron(III) and zinc(II) ions. Cyclization of 2,3-dichloroquinoxaline (1) with a bis-amidine 9 leads to ring-fused quinoxalines of type 10. One of these compounds (10a) forms a unique macrocyclic hexameric complex 14 with zinc ions in the presence of 2,6-diisopropyl phenolate. In an analogous manner, the monomeric complexes 12 and 13 could be synthesized. All of these new zinc complexes catalyze the copolymerization of cyclohexene oxide and carbon dioxide with a high degree of selectivity in the resulting polymers.

scholarly journals Pyrazole Supported Zinc(II) Benzoates as Catalysts for the Ring Opening Copolymerization of Cyclohexene Oxide and Carbon Dioxide

Catalysts ◽  
2016 ◽  
Vol 6 (1) ◽  
pp. 17 ◽  
Author(s):  
Mapudumo Lephoto ◽  
Koji Nakano ◽  
Divambal Appavoo ◽  
Bernard Owaga ◽  
Kyoko Nozaki ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ring Opening ◽  
Cyclohexene Oxide

Chromium Diamino-bis(phenolate) Complexes as Catalysts for the Ring-Opening Copolymerization of Cyclohexene Oxide and Carbon Dioxide

2020 ◽  
Vol 59 (20) ◽  
pp. 15375-15383
Author(s):  
Kenson Ambrose ◽  
Jennifer N. Murphy ◽  
Christopher M. Kozak
Keyword(s):  
Carbon Dioxide ◽  
Ring Opening ◽  
Cyclohexene Oxide

Bimetallic bis(benzotriazole iminophenolate) cobalt, nickel and zinc complexes as versatile catalysts for coupling of carbon dioxide with epoxides and copolymerization of phthalic anhydride with cyclohexene oxide

2016 ◽  
Vol 6 (6) ◽  
pp. 1779-1791 ◽  
Author(s):  
Chun-Yue Yu ◽  
Hui-Ju Chuang ◽  
Bao-Tsan Ko
Keyword(s):  
Carbon Dioxide ◽  
Phthalic Anhydride ◽  
Nickel Catalysts ◽  
Zinc Complexes ◽  
Cyclohexene Oxide ◽  
Cobalt Nickel ◽  
Cobalt And Nickel

New bimetallic bis(benzotriazole iminophenolate) cobalt and nickel catalysts were developed for versatile catalysis of CO2/epoxide coupling and PA/CHO copolymerization.

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