Halochrome Molekeln 4. Mitteilung. Chromogene Verbindungen durch Cyclisierung von [2‐(Benzothiazol‐2‐yl)amino‐4‐(diäthylamino)phenyl]heteroaryliumsalzen: Synthese und acidobasisches Verhalten | Zendy

Ziegler Hugo | Zendy; Balli Heinz | Zendy

Premium

Halochrome Molekeln 4. Mitteilung. Chromogene Verbindungen durch Cyclisierung von [2‐(Benzothiazol‐2‐yl)amino‐4‐(diäthylamino)phenyl]heteroaryliumsalzen: Synthese und acidobasisches Verhalten

Author(s) -

Ziegler Hugo,

Balli Heinz

Publication year - 1983

Publication title -

helvetica chimica acta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.74

H-Index - 82

eISSN - 1522-2675

pISSN - 0018-019X

DOI - 10.1002/hlca.19830660728

Subject(s) - chemistry , deprotonation , protonation , medicinal chemistry , chromogenic , molecule , nuclear magnetic resonance spectroscopy , spectroscopy , resonance (particle physics) , polymer chemistry , stereochemistry , organic chemistry , ion , chromatography , physics , quantum mechanics , particle physics

Halochromic Molecules. Chromogenic Compounds by Cyclization of [2‐(Benzothiazol‐2‐yl)amino‐4‐(diethylamino)phenyl]heteroarylium Salts: Synthesis and Acidobasic Behaviour Coloured [2‐(Benzothiazol‐2‐yl)amino‐4‐(diethylamino)phenyl]heteroarylium salts are deprotonated to colourless spiro‐compounds. The preparation of these products is described and their structure is explained by 1 H‐NMR and UV/VIS spectroscopy. An investigation of the halochromic properties is carried out by spectro‐photometric determination of ε pH *‐ and εH 0 *‐curves in buffered MeOH/H 2 O solutions. p K *‐Values are determined, and the complex protonation equilibria are discussed. One of the heteroarylium salts does not form a spiro‐compound by deprotonation, but it is stabilized by a σ‐bond resonance.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research