Rechecking of the equilibrium gas-phase basicity scale for low-basicity compounds using fourier transform ion cyclotron resonance spectrometry
作者:Ilmar A. Koppel、Frederick Anvia、Robert W. Taft
DOI:10.1002/poc.610071210
日期:1994.12
Fourier transform ioncyclotronresonance (FT-ICR) spectrometry was used to study and recheck the proton transfer equilibria for a large number of low-basicity compounds, particularly those which are less basic than H2O. The data obtained were used for the construction of a continuous scale of the relative gas-phase basicities between H2S and SO2F2. The present results are compared with the results
傅里叶变换离子回旋共振(FT-ICR)光谱用于研究和检查大量低碱度化合物的质子传递平衡,特别是那些碱性比H 2 O低的化合物。所得数据用于构建H 2 S和SO 2 F 2之间的相对气相碱度的连续标度。将本结果与McMahon及其同事使用ICR光谱法和高压质谱(HPMS)技术获得的结果进行比较。发现与现有的ICR光谱数据令人满意。但是,结果显示与先前和最新的HPMS结果存在无法解释的差异,而且内部也不是一致的。讨论了一些低碱性化合物(腈,羰基化合物,醚等)的取代基作用。
3,3,3-Trifluoro-1-nitropropene as a Novel Trifluoromethyl-Containing Building Block
Additions of various carbanion nucleophiles to 3,3,3-trifluoro-1-nitropropene (1) proceeded regiospecifically at the C-2 position of 1 to give the corresponding adducts. The nitro group of the adducts, derived from the reactions with acetylacetone and ethyl acetoacetate, was reduced to the corresponding amines, which were cyclized in situ to the 3-(trifluoromethyl)pyrrole derivatives.