Electronic properties of two adjacent intramolecular hydrogen bonds and their effects to the molecular charge distribution: Experimental synchrotron microcrystal and DFT computational study

► Molecular structure of two adjacent hydrogen bonds (O-H⋯O, N-H⋯O) was demonstrated. ► The electron localizability indicator (ELI) and delocalization index (DI) were employed. ► The analysis of the source function (SF) was applied. ► The resonance effect is more pronounced for O-H⋯O than for N-H⋯O interactions.