Back to Search
Start Over
New Coordination Complexes Based on the 2,6-bis[1-(Phenylimino)ethyl] Pyridine Ligand: Effective Catalysts for the Synthesis of Propylene Carbonates from Carbon Dioxide and Epoxides
- Source :
- Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry, Molecules, Vol 23, Iss 9, p 2304 (2018), Molecules, Volume 23, Issue 9
- Publication Year :
- 2018
- Publisher :
- MDPI, 2018.
-
Abstract
- We aimed to develop new effective catalysts for the synthesis of propylene carbonate from propylene oxide and carbon dioxide. A kind of Mx+LClx coordination complex was fabricated based on the chelating tridentate ligand 2,6-bis[1-(phenylimino)ethyl] pyridine (L). The obtained products were characterized by elemental analysis, infrared spectroscopy, ultraviolet spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction. It was found that the catalytic activity of the complexes with different metal ions, the same ligand differed and co-catalyst, where the order of greatest to least catalytic activity was 2 &gt<br />3 &gt<br />1. The catalytic system composed of complex 2 and DMAP proved to have the better catalytic performance. The yields for complex 2 systems was 86.7% under the reaction conditions of 100 &deg<br />C, 2.5 MPa, and 4 h. The TOF was 1026 h&minus<br />1 under the reaction conditions of 200 &deg<br />C, 2.5 MPa, and 1 h. We also explored the influence of time, pressure, temperature, and reaction substrate concentration on the catalytic reactions. A hypothetical catalytic reaction mechanism is proposed based on density functional theory (DFT) calculations and the catalytic reaction results.
- Subjects :
- Pyridines
Static Electricity
Molecular Conformation
Pharmaceutical Science
Infrared spectroscopy
010402 general chemistry
DFT calculations
Crystallography, X-Ray
Ligands
01 natural sciences
Article
Catalysis
Analytical Chemistry
Coordination complex
lcsh:QD241-441
chemistry.chemical_compound
Propane
Ultraviolet visible spectroscopy
lcsh:Organic chemistry
Coordination Complexes
Drug Discovery
Pyridine
Polymer chemistry
Propylene oxide
Physical and Theoretical Chemistry
chemistry.chemical_classification
Cycloaddition Reaction
010405 organic chemistry
Ligand
Organic Chemistry
catalyst for propylene carbonate
carbon dioxide
0104 chemical sciences
chemistry
Chemistry (miscellaneous)
Propylene carbonate
Molecular Medicine
Epoxy Compounds
Subjects
Details
- Language :
- English
- ISSN :
- 14203049
- Volume :
- 23
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry
- Accession number :
- edsair.doi.dedup.....5d1a0929913d35c7743c90aa6725dac8