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13C N.M.R. spectra of carbenium salts obtained from derivatives of phthalic acid

✍ Scribed by Stephen C Eyley; Harry Heaney; Khushbir S Sodhi

Publisher: Elsevier Science
Year: 1986
Tongue: French
Weight: 131 KB
Volume: 27
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)85451-9

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✦ Synopsis

g-Methoxycarbonylbenzoyl chloride reacts with Lewis acids in S02/CD2C12 to give solutions of carbenium salts which can be identified using 13 C nmr spectroscopy.

Acyl dialkyloxonium salts' and one example each of a diacyl alkyloxonium-2 and a triacyloxonium-3 salt have been reported but nmr data, especially 13 C data are sparse. Our interest in cationic alkylating and acylating agents and the divergence of published data2 from our own findings prompt this report of some of our results. We were not able to repeat the published experiment, 2. In which methyl hydrogen phthalate was apparently treated with

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