Isolation of a Pyridinium Alkoxy Ion Bridged Dimeric Zinc Complex for the Coupling Reactions of CO2 and Epoxides

Kim, Hoon Sik; Kim, Jai Jun; Lee, Byung Gwon; Jung, Ok Sang; Jang, Ho G.; Kang, Sang Ook

doi:10.1002/1521-3773(20001117)39:22<4096::aid-anie4096>3.3.co;2-0

Cited by 32 publications

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“…Over the years, numerous homogeneous catalysts have been reported in the literature for their ability to synthesize cyclic carbonates with varying yields and TOFs. These include quaternary ammonium salts [15], alkali and alkaline earth metal salts [16,17], tin and antimony compounds [18], various transition metal salts [19][20][21], and ionic liquids [22] etc.…”

Section: Introductionmentioning

confidence: 89%

Cycloaddition of CO2 to Epoxides Using a Highly Active Co(III) Complex of Tetraamidomacrocyclic Ligand

et al. 2010

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Synthesis of various cyclic carbonates with yield up to 100% and turn over frequency (TOF) of 351 h -1 using CO 2 and epoxides and a cobalt (III) complex of tetraamidomacrocyclic ligand is described. The catalyst was characterized by single crystal X-ray crystallography. A study of reaction conditions indicates that 2 MPa pressure of CO 2 without any co-solvent is sufficient to achieve the desired product.

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Section: Introductionmentioning

confidence: 89%

Cycloaddition of CO2 to Epoxides Using a Highly Active Co(III) Complex of Tetraamidomacrocyclic Ligand

et al. 2010

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“…Moreover, a possible utilization of cyclic carbonates, such as propylene carbonate (PC) and ethylene carbonate (EC), is the transesterification with methanol to form dimethyl carbonate (DMC) and the corresponding glycol. Especially, the synthesis of DMC from methanol and PC is widely used in the industrial synthetic process and regarded as a process utilizing carbon dioxide as a raw material due to that PC could be effectively synthesized via the cycloaddition of propylene oxide (PO) and carbon dioxide [4][5][6][7][8]. In addition, there are some other methods for the synthesis of DMC via carbon dioxide, which include direct synthesis from carbon dioxide and methanol [9][10][11][12][13] and alcoholysis of urea with methanol [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effective synthesis of propylene carbonate from propylene glycol and carbon dioxide by alkali carbonates

Huang

Liu

et al. 2006

Catal Lett

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Alkali carbonates were first used as effective catalysts for the synthesis of propylene carbonate from propylene glycol and carbon dioxide in the presence of acetonitrile. Acetonitrile in the reaction acted as not only the solvent but also the dehydrating reagent to remove the water produced from the reaction. Interestingly, upon ammonium carbonate being introduced into the reaction system, the catalytic selectivity was significantly enhanced.

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“…The homogeneous catalysts [11][12][13][14][15][16][17][18][19][20][21][22][23][24] include salen, porphyrin, phthalocyanine and other complexes of the main group and transition metals (Zn, Al, Cr, Co, Cu, Ni and Sn), as well as quaternary ammonium salts, ionic liquids and polyoxometalates. However, these usually suffer from drawbacks such as low catalytic activity/ selectivity, high temperature and pressure, water sensitivity and importantly for industrial application the corrosion of the catalyst to the reactor materials is so serious.…”

Section: Introductionmentioning

confidence: 99%

Homogenous Dual-Ligand Zinc Complex Catalysts for Chemical Fixation of CO2 to Propylene Carbonate

et al. 2015

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Homogeneous dual-ligand zinc complex catalysts was developed for the synthesis of propylene carbonate (PC) through chemical fixation of CO 2 . It was found that among a number of various pK a N-donor ligands, the catalytic performance was enhanced dramatically and the corrosion of the reaction system was effectively inhibited when 1-methylimidazol (1MI) was used as the N-donor ligand, in which [90 % PC yield could be obtained under mild reaction conditions. The dual-ligand zinc complex catalysts were characterized by various spectroscopic techniques such as FT-IR and 1 HNMR. X-ray crystallography showed that the Zn(II) atom was coordinated in tetrahedron geometry by three bromine atom, one 1MI nitrogen atom, and one crystallographically independent cation to give a 3D tetrahedron structure, which forms tetracoordinated complexes. The structure of the complex gives the reasons for the enhancement of the catalytic activity from the microscopic molecular structure point of an extremely long and therefore labile Zn-Br bond, the diversification of the bond angles, and the interplay between the steric hindrance, which have great influence on the interaction forces of Zn-Br. Graphical Abstract

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Isolation of a Pyridinium Alkoxy Ion Bridged Dimeric Zinc Complex for the Coupling Reactions of CO2 and Epoxides

Cited by 32 publications

References 0 publications

Cycloaddition of CO2 to Epoxides Using a Highly Active Co(III) Complex of Tetraamidomacrocyclic Ligand

Cycloaddition of CO2 to Epoxides Using a Highly Active Co(III) Complex of Tetraamidomacrocyclic Ligand

Effective synthesis of propylene carbonate from propylene glycol and carbon dioxide by alkali carbonates

Homogenous Dual-Ligand Zinc Complex Catalysts for Chemical Fixation of CO2 to Propylene Carbonate

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