On the role of DMSO-O(lone pair)•••π(arene), DMSO-S(lone pair)•••π(arene) and S=O•••π(arene) interactions in the crystal structures of dimethyl sulphoxide (DMSO) solvates

Dimethyl sulphoxide (DMSO) molecules in their all-organic solvates were shown to interact with arene rings of organic molecules via DMSO-O(lone pair)center dot center dot center dot pi(arene) or DMSO-S(lone pair)center dot center dot center dot pi(arene) interactions in approximately 5-6% of their crystal structures, often in conjunction with conventional hydrogen bonding involving the O(DMSO) atom, resulting in zero-, one-and two-dimensional supramolecular architectures. Zero-, one-and two-dimensional supramolecular architectures were also found to be sustained by parallel S=O center dot center dot center dot pi(arene) interactions operating in combination with hydrogen bonding.