Häkli, H. and Mintas, M. and Mannschreck, Albrecht (1979) Protonenresonanz-Untersuchugen zur Inversion am dreibindigen Stickstoffatom 6. Preparative Separations of Enantiomeric Diaziridines by Liquid Chromatography on Triacetylcellulose. Racemizations Monitored by Polarimetry and by ¹H NMR. Chemische Berichte 112 (6), pp. 2028-2038.
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Enantiomeric diaziridines have been partially separated by chromatography on triacetlycellulose. (−)-2, (+)-4, and (−)-4 were obtained almost pure, enantiomeric purities (Table 1) being measured by 1H NMR in the presence of optically active additives. The same procedure was tested for monitoring racemizations (Table 2) which were also studied, with higher accuracy, by polarimetry. The barriers to nitrogen inversion, converting the trans-diaziridines 2and4into cis-intermediates, are compared with known ΔG≠ values.
|Additional information (public):||späterer Zeitschr.titel: European journal of inorganic chemistry|
|Institutions:||Chemistry and Pharmacy > Institut für Organische Chemie > Retired Professors > Prof.Dr. Mannschreck|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||12 Nov 2010 08:49|
|Last Modified:||12 Nov 2010 08:49|