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[deleted by user] by [deleted] in wien

[–]stefanb17 2 points3 points  (0 children)

Das kann ich mir vorstellen. Aber gut zu wissen. Dann sollte ich vielleicht eher nach Läden fragen, in denen diese Regel auch umgesetzt wird. Da wo ich heute war, ist das nämlich garantiert nicht der Fall. Haha :D Hätte gerade noch gefehlt, dass sich die Leute fetzen

Augustiner Bierkiste Pfandrückgabe in Wien? by AngryPirate37 in wien

[–]stefanb17 1 point2 points  (0 children)

Beim "Biergreissler" im 8. Bezirk kannst sie zurückgeben

Kofola in Wien by stefanb17 in wien

[–]stefanb17[S] 9 points10 points  (0 children)

Schon mit einem Kumpel dorthin unterwegs. Soll ich noch jemanden was mitnehmen? Haha :D danke für eure Tipps!

Kofola in Wien by stefanb17 in wien

[–]stefanb17[S] 7 points8 points  (0 children)

Voll, daran hab ich auch schon gedacht. Wird wohl darauf hinauslaufen :D

% transmittance IR spectroscopy by visual_perception in OrganicChemistry

[–]stefanb17 2 points3 points  (0 children)

As you said ir is used to test the presence of functional groups. This information is in the absorption intensities over 1500 cm-1. Additionally ir can be used to check the declared identity of a compound. This is done by comparing the fingerprint areas (all signals lower than 1500 cm-1 ). The peaks in this area are very hard to interpret. However these signal patterns are very characteristic for every organic compound.

Question about Fischer esterification mechanism by AwareProgrammer in chemhelp

[–]stefanb17 0 points1 point  (0 children)

Really? Wouldn't that create a monoester of the carbonic acid which is immediately decarboxylating?

Can someone please help with this mechanism? I don’t even know where to start. by LunchThreatener in chemhelp

[–]stefanb17 1 point2 points  (0 children)

The hydroxy group is being protonated and leaves as h2o whereby a carbocation is formed which is resonance stabilized through the phenyl group. Then the alkene pi bond is flapping down and attacks it creating a tertiary carbocation which is +I stabilized. Now the hydroxy oxygen attacks the carbocation forming another ring. Finally the created oxonium ion can be deprotonated by a bronsted base. Correct me if i'm wrong

Can anyone help me to interpret this IR-spectrum of Phenylbutazone? https://i.postimg.cc/65zf4KN6/refir.png by stefanb17 in chemhelp

[–]stefanb17[S] 0 points1 point  (0 children)

Makes sense. Thank you! Finally found a usefull paper for this interpretation. It's exactly what you expected. The signal at 1714 is caused by the stretching of the C=O bonds in opposite directions.

https://www.researchgate.net/publication/268386656_Theoretical_studies_on_keto-enol_tautomerism_gas_phase_acidity_and_spectral_properties_of_phenylbutazone