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Novel pyridinium based cobalt carbonyl ionic liquids: synthesis, full characterization, crystal stru

Release time:2007-11-10 16:54:00        Reading times:

  Through an optimized synthetic strategy, a series of novel alkylpyridinium cobalt tetracarbonyl salts, [C1Py][Co(CO)4] ( 2a), [C4Py][Co(CO)4] ( 2b) and [C16Py][Co(CO)4] ( 2c) (CnPy = N-CnH2n+1-pyridinium), were successfully prepared in good yields, using a water–organic biphasic system. All the three compounds melt well below 100 °C and could be classified as ionic liquids. The compounds were fully characterized using IR, UV-Vis, 1H NMR, 13C NMR, ESI-MS and elemental analysis, and 2c was structurally characterized by X-ray single crystal analysis. Compound 2b has been found to be an efficient and reusable catalyst for the alkoxycarbonylation of propylene oxide without the aid of a base additive.


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