SCHEDULED MAINTENANCE
In contrast to current belief, the doublet at 2300 and 2200 cm–1 observed in the i.r. spectra of certain acylating media is not due to two different types of acetylium ion, but to the formation of the diacetylacetylium ion (2200 cm–1), a trimer of the acetylium ion (2300 cm–1).
A. Germain, A. Commeyras and A. Casadevall, J. Chem. Soc. D, 1971, 633 DOI: 10.1039/C29710000633
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