Controlled preinoculation of supercooled liquids condensed in droplets from pseudosublimation of solid chemical compounds
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Summary
The application of pre-inoculation to droplets of supercooled liquids, as has been done in sublimation, can provide satisfactory crystals for the measurement of profile angles, which may be used for such purposes as distinguishing between homologs. The method is described in relation toN,N-dimethyl-p-nitroso aniline and the diethyl homolog. The advantages for forensic work are emphasised.
Keywords
Physical Chemistry Analytical Chemistry Inorganic Chemistry Diethyl AnilineZusammenfassung
Durch die Impfung unterkühltet Flüssigkeitströpfchen, wie sie beim Sublimieren auftreten, erhält man geeignete Kristalle für die Messung der Profilwinkel, die man zur Unterscheidung homologer Substanzen heranziehen kann. Die Methode wird am Beispiel des N,N-Dimethyl-p-nitrosoanilins und der entsprechenden Diäthylverbindung beschrieben. Die Vorteile auf forensisch-chemischem Gebiet werden hervorgehoben.
Résumé
L'emploi de la pré-inoculation de gouttelettes de liquides sous-refroidis, comme on l'a fait dans le cas de la sublimation, peut donner des cristaux satisfaisants pour la mesure des angles dièdres et que l'on peut utiliser à des fins telles que la distinction entre homologues. On décrit la méthode en se servant de la N,N-diméthylp-nitroso-aniline et son homologue diéthylique. On insiste sur les avantages en chimie légale.
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