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Coupling of carbon dioxide with neat propylene oxide catalyzed by aminebisphenolato cobalt(II)/(III) complexes and ionic co-catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50103 46779 2012 3 PDF Available
Title
Coupling of carbon dioxide with neat propylene oxide catalyzed by aminebisphenolato cobalt(II)/(III) complexes and ionic co-catalysts
Abstract

Cobalt complexes of tetradentate amine–phenolate ligands were studied for their potential in coupling carbon dioxide with propylene oxide under neat reaction conditions. Cobalt(II) complexes afforded catalytic systems with higher TONs than analogous cobalt(III) compounds. Tetrabutylammonium bromide (TBAB) and PPN+N3− were effective co-catalysts whereas N,N-dimethylaminopyridine (DMAP) shut down reactivity. Ligands containing a pendant pyridyl donor afforded more active catalysts than those containing dimethylamine groups. Reactions proceeded well at room temperature under moderate pressures of carbon dioxide.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Oxidation state of cobalt center plays crucial role in determining activity. ► Activity is greater for complexes of pyridyl-containing ligand. ► Ionic co-catalysts are more effective than neutral Lewis bases with these catalysts. ► High TON achieved at room temperature under solvent-free condition.

Keywords
Epoxide; Carbon dioxide; Cobalt; Cyclic carbonate; N,O-ligand
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Coupling of carbon dioxide with neat propylene oxide catalyzed by aminebisphenolato cobalt(II)/(III) complexes and ionic co-catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 18, 10 February 2012, Pages 165–167
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us