Abstract
Abstract The electron density distribution (EDD) of a cyclic tetrasaccharide composed of four benzoylated galactopyranosyl units was calculated from refinement with scattering factors from the invariom library based on X-ray diffraction data downloaded from the Crystal Structural Data Base (CSD). Bond topological and atomic properties have been derived. Benzoyl substituents cause weak intermolecular interactions. These are also visible from low electron density concentrations on the Hirshfeld surface and have an influence on a low X-ray density compared to that of non-substituted carbohydrates, where hydrogen bonds allow a 20% more dense packing. On the electrostatic potential (ESP) surface, a strong polarization between the positive outer belt of 12 benzoyl groups and a negative core region composed of the four galactose sugar molecules exists. The positive benzoyl exterior establishes a repulsive wall between adjacent molecules in the structure.
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