常温常压下稳定,避免与氧化物接触。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3-(乙基硫代)丙酸 | 3-(ethylthio)propanoic acid | 7244-82-8 | C5H10O2S | 134.199 |
3-巯基-1-丙醇 | 3-sulfanylpropanol | 19721-22-3 | C3H8OS | 92.1619 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (3-ethylsulfanyl-propoxy)-ethene | 26902-06-7 | C7H14OS | 146.254 |
Infrared studies of the NC-H stretching frequencies of selected trimethylammonium salts, including acetylcholine, were made in an attempt to obtain evidence that intramolecular NC-H—O hydrogen bonding is responsible for the existence in solution of a quasi-ring conformation for acetylcholine. Acetylcholine and related compounds were also examined by nuclear magnetic resonance spectroscopy. The carbonyl stretching frequencies of an homologous series of acetoxy alkyl sulphones were measured in dioxan solution to gain information on the effect of electron withdrawing substituents in the absence of intermolecular hydrogen bonding. The observed high ester carbonyl absorption frequency in acetylcholine may be interpreted in terms of the inductive effect from the onium nitrogen atom but the results are not incompatible with the existence of a quasi-ring conformation involving C-H—O hydrogen bonding between one of the N-methyl groups and the acetoxy oxygen atom.