Intermolecular proton transfer in cyclic carbonate synthesis from epoxide and carbon dioxide catalyzed by azaphosphatranes: a DFT mechanistic study

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 12382-12386 ◽  
Author(s):  
Zhiqiang Zhang ◽  
Liancai Xu ◽  
Wenkai Feng
Keyword(s):  
Carbon Dioxide ◽  
Proton Transfer ◽  
Dft Calculations ◽  
Cyclic Carbonate ◽  
Solvent Free ◽  
Mechanistic Study ◽  
Cyclic Carbonates ◽  
Intermolecular Proton Transfer

The activity of azaphosphatranes, novel types of non-metal and solvent-free catalysts for the synthesis of cyclic carbonates from epoxides and CO2, is unraveled by DFT calculations.

scholarly journals Synthesis of cyclic carbonates by ruthenium(VI) bis-imido porphyrin/TBACl-catalyzed reaction of epoxide with CO2

2020 ◽  
Vol 24 (05n07) ◽  
pp. 809-816
Author(s):  
Caterina Damiano ◽  
Paolo Sonzini ◽  
Daniela Intrieri ◽  
Emma Gallo
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
Nitrogen Atom ◽  
Binary System ◽  
Cyclic Carbonate ◽  
Mechanistic Study ◽  
Cyclic Carbonates ◽  
Experimental Conditions ◽  
Positive Role

The catalytic activity of the ruthenium(VI) bis-imido porphyrin complex/TBACl binary system in promoting the CO[Formula: see text] cycloaddition to epoxides forming cyclic carbonates is here reported. The system was very efficient in catalyzing the conversion of differently substituted epoxides under mild experimental conditions (100 [Formula: see text]C and 0.6 MPa of CO[Formula: see text]. Even if the sole TBACl resulted active under the optimized experimental conditions, the addition of ruthenium species was fundamental to maximizing the reaction productivity both in terms of epoxide conversions and cyclic carbonate selectivities. A preliminary mechanistic study indicated a positive role of ruthenium imido nitrogen atom in activating carbon dioxide.

Bimetallic scorpionate-based helical organoaluminum complexes for efficient carbon dioxide fixation into a variety of cyclic carbonates

2020 ◽  
Vol 10 (10) ◽  
pp. 3265-3278 ◽  
Author(s):  
Marta Navarro ◽  
Luis F. Sánchez-Barba ◽  
Andrés Garcés ◽  
Juan Fernández-Baeza ◽  
Israel Fernández ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Carbonate ◽  
Carbon Dioxide Fixation ◽  
Cyclic Carbonates ◽  
Carbonate Formation ◽  
Aluminum Complexes

The binuclear aluminum complexes [AlR2(κ2-NN′;κ2-NN′)AlR2] with TBAB/PPNCl behave as excellent systems for cyclic carbonate formation from CO2 with challenging epoxides.

High conversion of CO2 into cyclic carbonates under solvent free and ambient pressure conditions by a Fe-cyanide complex

2019 ◽  
Vol 43 (44) ◽  
pp. 17211-17219 ◽  
Author(s):  
Pengbo Jiang ◽  
Lei Ma ◽  
Kaizhi Wang ◽  
Kai Lan ◽  
Zhenzhen Zhan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ambient Pressure ◽  
Solvent Free ◽  
High Conversion ◽  
Cyanide Complex ◽  
Cyclic Carbonates ◽  
Great Demand

Methods of converting carbon dioxide into valuable chemicals are of great demand but their development is still challenging.

scholarly journals Highly Active CO2 Fixation into Cyclic Carbonates Catalyzed by Tetranuclear Aluminum Benzodiimidazole-Diylidene Adducts

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 2
Author(s):  
Ángela Mesías-Salazar ◽  
Yersica Rios Yepes ◽  
Javier Martínez ◽  
René S. Rojas
Keyword(s):  
Carbon Dioxide ◽  
Co2 Fixation ◽  
Cyclic Carbonate ◽  
Spectroscopic Methods ◽  
Cyclic Carbonates ◽  
Efficient Catalyst ◽  
Highly Active ◽  
Carbonate Formation ◽  
Tetrabutylammonium Iodide

A set of tetranuclear alkyl aluminum adducts 1 and 2 supported by benzodiimidazole-diylidene ligands L1, N,N’-(1,5-diisopropylbenzodiimidazole-2,6-diylidene)bis(propan-2-amine), and L2, N,N’-(1,5-dicyclohexyl-benzodiimidazole-2,6-diylidene)dicyclohexanamine were synthetized in exceptional yields and characterized by spectroscopic methods. These compounds were studied as catalysts for cyclic carbonate formation (3a–o) from their corresponding terminal epoxides (2a–o) and carbon dioxide utilizing tetrabutylammonium iodide as a nucleophile in the absence of a solvent. The experiments were carried out at 70 °C and 1 bar CO2 pressure for 24 h and adduct 1 was the most efficient catalyst for the synthesis of a large variety of monosubstituted cyclic carbonates with excellent conversions and yields.

Nicotine-derived ammonium salts as highly efficient catalysts for chemical fixation of carbon dioxide into cyclic carbonates under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 61179-61183 ◽  
Author(s):  
Abdol R. Hajipour ◽  
Yasaman Heidari ◽  
Gholamreza Kozehgary
Keyword(s):  
Carbon Dioxide ◽  
Organic Solvent ◽  
Solvent Free ◽  
Ammonium Salts ◽  
Chemical Fixation ◽  
Cyclic Carbonates ◽  
Highly Efficient ◽  
Solvent Free Conditions ◽  
Recyclable Catalysts ◽  
Fixation Of Carbon Dioxide

Ammonium salts based on nicotine proved to be highly efficient and recyclable catalysts for the synthesis of cyclic carbonates from epoxides and CO2 without the utilization of any organic solvent and any additives.

scholarly journals Cycloaddition Reaction of Carbon Dioxide to Epoxides Catalyzed by Polymer-Supported Quaternary Phosphonium Salts

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Yubing Xiong ◽  
Feng Bai ◽  
Zipeng Cui ◽  
Na Guo ◽  
Rongmin Wang
Keyword(s):  
Carbon Dioxide ◽  
Low Cost ◽  
Cycloaddition Reaction ◽  
Coupling Reaction ◽  
Catalytic Performance ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
Phosphonium Salts ◽  
Polymer Supported ◽  
High Yields

Polymer-supported quaternary phosphonium salt (PS-QPS) was explored as effective catalyst for the coupling reaction of carbon dioxide with epoxides. The results indicated that cyclic carbonates with high yields (98.6%) and excellent selectivity (100%) could be prepared at the conditions of 5 MPa CO2, 150°C, and 6 h without the addition of organic solvents or cocatalysts. The effects of various reaction conditions on the catalytic performance were investigated in detail. The catalyst is applicable to a variety of epoxides, producing the corresponding cyclic carbonates in good yields. Furthermore, the catalyst could be recovered easily and reused for five times without loss of catalytic activity obviously. A proposed mechanism for synthesis of cyclic carbonate in the presence of PS-QPS was discussed. The catalyst was characterized by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectrum. It is believed that PS-QPS is of great potential for CO2fixation applications due to its unusual advantages, such as easy preparation, high activity and selectivity, stability, low cost, and reusability.

Poly(ethylene glycol): an Alternative Solvent for the Synthesis of Cyclic Carbonate from Vicinal Halohydrin and Carbon Dioxide

2009 ◽  
Vol 62 (8) ◽  
pp. 917 ◽  
Author(s):  
Jing-Lun Wang ◽  
Liang-Nian He ◽  
Xiao-Yong Dou ◽  
Fang Wu
Keyword(s):  
Carbon Dioxide ◽  
Ethylene Glycol ◽  
Reaction Medium ◽  
Cyclic Carbonate ◽  
High Yield ◽  
Cyclic Carbonates ◽  
Poly Ethylene Glycol ◽  
Potential Applications ◽  
Ready Availability ◽  
Poly Ethylene

Poly(ethylene glycol) (PEG) in this work proved to be an efficient reaction medium for the reaction of vicinal halohydrin with carbon dioxide in the presence of a base to synthesise cyclic carbonates. Notably, PEG-400 as an environmentally friendly solvent exhibits a unique influence on reactivity compared with conventional organic solvents. Various cyclic carbonates were prepared in high yield employing this protocol. The process presented here has potential applications in the industrial production of cyclic carbonates because of its simplicity, cost benefits, ready availability of starting materials, and mild reaction conditions.

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