New benzimidazolic 3-hydroxychromone derivative with two alternative mechanisms of the excited state intramolecular proton transfer reaction
摘要:
The 2-(benzimidazol-2-yl) derivative of 3-hydroxychromone was synthesized and studied by X-ray structure analysis, H-1 NMR and fluorescence spectroscopy. The possibility of the alternative H-bonds formation and thus - two alternative mechanisms of the excited state intramolecular proton transfer reaction was discussed on the base of the spectral data, X-ray structure analysis and quantum-chemical calculations. (C) 2007 Elsevier B.V. All rights reserved.
New benzimidazolic 3-hydroxychromone derivative with two alternative mechanisms of the excited state intramolecular proton transfer reaction
摘要:
The 2-(benzimidazol-2-yl) derivative of 3-hydroxychromone was synthesized and studied by X-ray structure analysis, H-1 NMR and fluorescence spectroscopy. The possibility of the alternative H-bonds formation and thus - two alternative mechanisms of the excited state intramolecular proton transfer reaction was discussed on the base of the spectral data, X-ray structure analysis and quantum-chemical calculations. (C) 2007 Elsevier B.V. All rights reserved.