Schönenberger, Helmut and Thies, Heinrich and Borah, Kripanath (1970) Quantitative determination of amine mixtures by multiplicative distribution. IX. Separation of organic bases by Craig distribution. Fresenius' Zeitschrift für analytische Chemie 251 (5), pp. 294-298.
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The sepn. of (+-)-BuNHCHPhCHPhNHBu, its meso isomer (I), iso-PrCHPhNHBu (II), PhCH2NHBu, and BuNH2, formed by reaction of benzylidenebutylamine with isopropylmagnesium halide in presence of MnCl2, by Craig after-fractionation processes in the solvent system CHCl3-MeOH-2% HCl (40:12:28) was complete after 95 steps in a distribution machine with 35 elements (E. Hecker, 1955). The over-all recovery was .apprx.93%; the deviation in the recovery of a single component was ?2%. The amines could be detd. even with incomplete sepn. after 54 steps by graphical evaluation of the overlapping distribution curves, if the portion of I was high enough (I > II). Temp. constancy was necessary.
|Additional information (public):||CAN 73:105238 80 Organic Analytical Chemistry 109-73-9; 1137-52-6; 1165-52-2; 2403-22-7; 2403-38-5 Role: ANST (Analytical study) (sepn. of, Craig distribution in)|
|Institutions:||Chemistry and Pharmacy > Institute of Pharmacy > Retired Professors > Prof. Schönenberger|
|Keywords:||Amines Role: ANST (Analytical study) (sepn. of, Craig distribution in) sepn amines Craig distribution amines sepn Craig distribution Craig distribution sepn amines distribution Craig sepn amines|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||19 Nov 2010 09:29|
|Last Modified:||19 Nov 2010 09:29|
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