In situ IR and multinuclear NMR are used to monitor the formation of protonated diacetylketene tetrachloroaluminate (1) in the reaction of acetyl chloride and AlCl3 in both dichloromethane and in 1-butyl-3-methylimidazolium chloride ([bmim]Cl). The existence of a fast equilibrium between two enolic forms of protonated diacetylketene (with [AlCl4]− as the counterion) is established. The structure of 1 is determined by the rarely used 13C(1H)–13C(1H) COSY experiment.
|Number of pages||5|
|Journal||Journal of the Chemical Society. Perkin Transactions 1|
|Publication status||Published - Aug 29 2002|
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