scholarly journals Ring-opening Cationic Copolymerization of Liquid SO2 with Cyclohexene Oxide

1975 ◽  
Vol 32 (11) ◽  
pp. 660-664 ◽  
Author(s):  
Minoru MATSUDA ◽  
Fuminori AKIYAMA ◽  
Yoshinori HARA
Keyword(s):  
Ring Opening ◽  
Cyclohexene Oxide ◽  
Cationic Copolymerization

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 Heterodinuclear complexes featuring Zn(ii) and M = Al(iii), Ga(iii) or In(iii) for cyclohexene oxide and CO2 copolymerisation

2020 ◽  
Vol 49 (1) ◽  
pp. 223-231 ◽  
Author(s):  
Arron C. Deacy ◽  
Christopher B. Durr ◽  
Charlotte K. Williams
Keyword(s):  
Ring Opening ◽  
Cyclohexene Oxide ◽  
Group 13

A series of heterodinuclear zinc(ii)-Group 13 catalysts are synthesised by a sequential metalation procedure. They are active catalysts for the ring opening copolymerisation of cyclohexene oxide and CO2.

ASYMMETRIC RING-OPENING OF CYCLOHEXENE OXIDE WITH VARIOUS THIOLS CATALYZED BY ZINCLq-TARTRATE

1985 ◽  
Vol 14 (11) ◽  
pp. 1643-1646 ◽  
Author(s):  
Hiroyuki Yamashita ◽  
Teruaki Mukaiyama
Keyword(s):  
Ring Opening ◽  
Cyclohexene Oxide ◽  
Asymmetric Ring Opening

Alternating Ring-Opening Polymerization of Cyclohexene Oxide and Anhydrides: Effect of Catalyst, Cocatalyst, and Anhydride Structure

2012 ◽  
Vol 45 (4) ◽  
pp. 1770-1776 ◽  
Author(s):  
Elham Hosseini Nejad ◽  
Carlo G. W. van Melis ◽  
Tim J. Vermeer ◽  
Cor E. Koning ◽  
Rob Duchateau
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Cyclohexene Oxide

scholarly journals Keggin-Type Heteropolyacid for Ring-Opening Polymerization of Cyclohexene Oxide: Molecular Weight Control

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Ahmed Aouissi ◽  
Zeid Abdullah Al-Othman ◽  
Abdurrahman Salhabi
Keyword(s):  
Molecular Weight ◽  
Reaction Time ◽  
Acetic Anhydride ◽  
Ring Opening ◽  
Weight Control ◽  
Reaction Medium ◽  
Resonance Spectroscopy ◽  
Cyclohexene Oxide ◽  
Scanning Calorimetry ◽  
Catalyst Amount

Polymerization of 1,2-cyclohexene oxide (CHO) in dichloromethane was catalyzed by 12-tungstophosphoric acid (H3PW12O40·13H2O) as a super solid acid. The effect of polymerization parameters such as reaction time, temperature, and catalyst amount was investigated. The effect of acetic anhydride as a ring-opening agent was also investigated. The resulting poly(1,2-cyclohexene oxide) (PCHO) was characterized by Fourier transform infrared (FTIR), nuclear magnetic resonance spectroscopy (1HNMR), gel-permeation chromatography (GPC), and differential scanning calorimetry (DSC). It has been found that the PCHO prepared over H3PW12O40·13H2O has a stereoregularity higher than that prepared over clay and Aluminium alkoxide catalysts. TheTgvalue obtained is due to the microstructure but not to molecular weight. The yield and the molecular weight of the polymer depend strongly on the reaction conditions. Molecular weights can be readily controlled by changing reaction temperature, reaction time, and catalyst amount. Contrary to most polymerization reactions, the molecular weight increases with the temperature increase. Addition of acetic anhydride to the reaction medium increased the yield threefold.

Chiral Ti(IV) Complexes of Hexadentate Schiff Bases as Precatalysts for the Asymmetric Addition of TMSCN to Aldehydes and the Ring Opening of Cyclohexene Oxide.

ChemInform ◽  
2007 ◽  
Vol 38 (6) ◽  
Author(s):  
Yuri N. Belokon ◽  
Denis Chusov ◽  
Dmitry A. Borkin ◽  
Lidia V. Yashkina ◽  
Andrey V. Dmitriev ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Ring Opening ◽  
Cyclohexene Oxide ◽  
Asymmetric Addition

Chromium Amino-bis(phenolate) Complexes as Catalysts for Ring-Opening Polymerization of Cyclohexene Oxide

2019 ◽  
Vol 52 (19) ◽  
pp. 7403-7412 ◽  
Author(s):  
Kenson Ambrose ◽  
Jennifer N. Murphy ◽  
Christopher M. Kozak
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Cyclohexene Oxide
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