Back to Search
Start Over
Cobalt complexes containing salen-type pyridoxal ligand and DMSO for cycloaddition of carbon dioxide to propylene oxide
- Source :
- Polyhedron. 178:114353
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Cobalt complexes containing a salen-type pyridoxal ligand with pyridine were synthesized as a new Co(III) catalytic system for the cycloaddition of carbon dioxide. Two cobalt(III) complexes possessing a salen-type pyridoxyl ligand were synthesized by the reaction of pyridoxal ligands (pyr2en = (N,N′-bis(pyridoxylideneiminato)ethylene) and pyr2cy = (N,N′-bis(pyridoxylideneiminato)cyclohexane)) and Co(OAc)2 and characterized by various analytical methods, including infrared spectroscopy and high-resolution mass analysis. Single-crystal X-ray crystallography analysis confirmed that the cobalt pyr2en complex had a distorted octahedral structure: the tetradentate Schiff base ligand binds the cobalt metal in one plane, and the metal center adopts an octahedral geometry by the additional coordination of acetate and dimethyl sulfoxide. The synthesized complexes were used as catalysts in the cycloaddition of carbon dioxide (CO2) to propylene oxide. The catalysts showed high activity for cycloaddition between CO2 and epoxides, even at a low loading (0.5 mol%), in the presence of various cocatalysts.
- Subjects :
- Schiff base
010405 organic chemistry
Ligand
chemistry.chemical_element
010402 general chemistry
01 natural sciences
Cycloaddition
0104 chemical sciences
Catalysis
Inorganic Chemistry
chemistry.chemical_compound
chemistry
Polymer chemistry
Pyridine
Octahedral molecular geometry
Materials Chemistry
Physical and Theoretical Chemistry
Pyridoxal
Cobalt
Subjects
Details
- ISSN :
- 02775387
- Volume :
- 178
- Database :
- OpenAIRE
- Journal :
- Polyhedron
- Accession number :
- edsair.doi...........e3e52750586d8db6bee41339f913e432
- Full Text :
- https://doi.org/10.1016/j.poly.2020.114353