کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
67083 | 48464 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Efficient coupling of CO2 and epoxides with bis(phenoxyiminato) cobalt(III)/Lewis base catalysts Efficient coupling of CO2 and epoxides with bis(phenoxyiminato) cobalt(III)/Lewis base catalysts](/preview/png/67083.png)
A series of unbridged bis(phenoxyiminato) cobalt(III)complexes were synthesized and studied as catalysts for the coupling of CO2 and epoxide. Dimethylamino pyridine (DMAP) and tetrabutyl ammonium bromide (Bu4NBr), were used as co-catalysts in the reaction. Both Co(III)/DMAP and Co(III)/Bu4NBr systems showed high catalytic activity and selectivity in the coupling of n-hexyl oxide and CO2, resulting in n-hexyl carbonate. Several mono- and di-substituted terminal epoxides were also tested. The reaction mechanism of the Co(III)/DMAP system was investigated in detail using ESI-MS revealing that in addition to the main product, cyclic carbonate, traces of oligomers are formed.
A series of unbridged bis(phenoxyiminato) cobalt(III)complexes were synthesized and studied as catalysts for the coupling of CO2 and epoxide. Dimethylamino pyridine (DMAP) and tetrabutyl ammonium bromide (Bu4NBr), were used as co-catalysts in the reaction. Both Co(III)/DMAP and Co(III)/Bu4NBr systems showed high catalytic activity and selectivity in the coupling of n-hexyl oxide and CO2, resulting in n-hexyl carbonate. Several mono- and di-substituted terminal epoxides were also tested. The reaction mechanism of the Co(III)/DMAP system was investigated in detail using ESI-MS revealing that in addition to the main product, cyclic carbonate, traces of oligomers are formed.Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 312, Issues 1–2, 1 October 2009, Pages 87–91