Reversibly self-assembling host-guest complexes of the these hydrogen-bonded complexes is retained in the gas phase with the guests inside their cavity. The results parallel softball type are characterized by electrospray ionization mass spectrometry. Quaternary ammonium ions serve findings from sol
Mass spectrometry of N-methylsulfonylureas. A re-examination
β Scribed by Aaron D. Kossoy; John L. Occolowitz
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 332 KB
- Volume
- 5
- Category
- Article
- ISSN
- 1076-5174
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β¦ Synopsis
Some confusion has arisen in the literature regarding the electron impact mass spectrum of N-methyltolbutamide. The situation is complicated by the thermal lability of this compound which causes the formation of the corresponding N-methylsulfonamide. We present here spectral data at relatively low probe temperatures (and without an intervening gas chromatographic system) which we believe define the mass spectrum of N-methyltolbutamide more accurately than before. Similar data are presented for the analogous N-methylacetohexamide and show a rearrangement process for both substances not reported previously for this class of compounds.
π SIMILAR VOLUMES
The thermospray mass spectrometry (TSP/MS) of five N-methylcarbamates is presented. This is the first time that ions other than [M + HI+ and [M + NHJ+ have been reported using positive TSP/MS. Protonation of ROCONHCH, yields the [CH3NHzCO]+' ion, with formation of the ion-molecule adduct [ROCONHCH,
## Abstract In a recent examination of the integrated nature of inflation, Culver and Papell (__Journal of Applied Econometrics__, 1997) applied a range of unit root and stationarity tests to data from a panel of 13 OECD economies. The results obtained were mixed. While little evidence of stationar