Electron density studies on hydrogen bonding in two chromone derivatives
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Magdalena Małecka1, Lilianna Chęcińska, Agnieszka Rybarczyk-Pirek
1Department of Structural Chemistry and Crystallography, University of Łódź, Tamka 12, Poland. malecka@uni.lodz.pl
Abstract:
The experimental electron densities of two chromone derivatives have been determined from X-ray synchrotron diffraction data at low temperature (100 K). Topological analysis of the electron density has been used to analyze the formation of resonance-assisted hydrogen bonds (RAHBs). Geometrical and topological parameters confirm π-electron delocalization within the hydrogen-bonded ring. In addition, weak C-H···O interactions were identified in both structures. Hydrogen-bond energies allowed medium and weak hydrogen bonds to be distinguished.
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