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在不使用Fe(CO)_3和CO_2(CO)_3为原科的情况下,于二甲基甲酰胺(DMF)和乙酰丙酮的混合溶液中加入CoCl_2·6H_2O和FeCl_3·6H_2O,在140℃下回流5小时,形成铁-钴系络合物。在羰基合成条件下,以己烯-[1]为原料进行醛化反应时,该络合物的催化活性比羰基乙酰丙酮铁和钴混合物更好。从而推测该体系可能形成新的铁-钴簇。在类似的体系中,添加四甲基溴化铵{[(CH_3)_4N]Br}作为相转移催化剂,原位合成催化剂,在十分温和的条件下,得到相当好的甲醇同系化活性。文中讨论了碘的促进作用及络合物形成的可能机制。
Without using Fe (CO) 3 and CO_2 (CO) _3 as the original families, CoCl_2 · 6H_2O and FeCl_3 · 6H_2O were added to the mixed solution of dimethylformamide (DMF) and acetylacetone at 140 ℃ Reflux for 5 hours to form an iron-cobalt complex. Under the condition of oxo synthesis, when the hexene- [1] was used as the raw material for the hydroformylation, the catalytic activity of the complex was better than that of the carbonyl acetylacetonate iron and cobalt mixture. It is speculated that the system may form a new iron - cobalt clusters. In a similar system, tetramethylammonium bromide {[(CH_3) _4N] Br} was added as a phase transfer catalyst to synthesize the catalyst in situ and gave quite good methanol homologation activity under very mild conditions. In this paper, the promotion of iodine and the possible mechanism of complex formation are discussed.