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Halochrome Molekeln. Synthese und acidobasisches Verhalten substituierter 3′,6′‐Bis (dimethylamino)‐spiro [5 H ‐imidazo [2, 1‐α]‐isoindolin‐5,9′‐xanthene]
Author(s) -
Gunzenhauser Sigmund,
Hellrung Bruno,
Balli Heinz
Publication year - 1979
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.19790620126
Subject(s) - chemistry , xanthene , protonation , medicinal chemistry , photochemistry , organic chemistry , ion
Halochromic Molecules. Synthesis and Acidobasic Behaviour of Substituted 3′,6′‐Bis(dimethylamino)‐spiro [5 H ‐imidazo [2,1‐α]isoindolin‐5,9′‐xanthenes] Substituted 3′,6′‐Bis (dimethylamino)‐spiro [5 H ‐imidazo [2, 1‐α]isoindolin‐5,9′‐xanthenes] are prepared and their 1 H‐NMR. spectra are discussed. An investigation of the complex protonation equilibria is made by stopped flow kinetic and spectrophotometric methods. p K values are determined and the results are discussed.