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- W2951925605 abstract "The H–D exchange of methylene protons in a side-chain when situated between a positively charged N-atom (α–CH2) and a ketone function was studied in various pilocarpinium (N-methyl imidazolium) and hydroximinomethyl pyridiniums using NMR measurements. Structural factors which determine the course of the exchange are reported, and the role of the solvent was examined. Mass-spectra of nondeuteriated and deuteriated 4-hydroximinomethyl-1-phenacyl-pyridinium chloride confirmed the fast exchange of the α–CHa. An alternative H–D exchange of the C2–H in the imidazolium moiety of certain pilocarpinium compounds without a ketone in the N-chain was detected. Mechanisms for the two types of exchanges involving an ylid as intermediate and attack of a deuteron were proposed." @default.
- W2951925605 created "2019-06-27" @default.
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- W2951925605 date "1975-04-08" @default.
- W2951925605 modified "2023-09-28" @default.
- W2951925605 title "ChemInform Abstract: STUDIES ON THE C-H/C-D EXCHANGE IN IMIDAZOLIUM (PILOCARPINIUM) AND IN 2- AND 4-HYDROXIMINOMETHYL PYRIDINIUM COMPOUNDS" @default.
- W2951925605 cites W1978822470 @default.
- W2951925605 doi "https://doi.org/10.1002/chin.197514140" @default.
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