| Abstract: | The crystal structure of catena‐polytriaquabis(ethanesulfonato‐κO)europium(III)]‐μ‐ethanesulfonato‐κ2O:O′], Eu(C2H5SO3)3(H2O)3]n, is the first reported determination of a rare earth ethanesulfonate and also of any hydrated binary metal ethanesulfonate. Two of the three ethanesulfonate anions act as bidentate bridging ligands and connect the single Eu(C2H5SO3)3(H2O)3] building blocks into infinite chains along the 010] direction. Hydrogen bonds between the water molecules of one chain and sulfonate anions and water molecules of adjacent chains associate the chains into a two‐dimensional supramolecular network. In the third direction, only van der Waals forces between the alkyl groups are observed. |
