A second monoclinic polymorph of caesium salicylate monohydrate

Abstract

The structure of the title caesium salt with salicylic acid, poly[μ2-aqua-μ4-(salicylato-κ4O1:O1:O1′:O2)caesium], [Cs(C7H5O3)(H2O)]n, represents a second monoclinic polymorph of this compound. The two-dimensional coordination polymeric structure is based on a centrosymmetric dinuclear bridged repeat unit with each irregular CsO6coordination polyhedron comprising a μ2-bridging water molecule and μ4-bridging O-atom donors, three from the carboxyl group and one from the phenolic group of the salicylate ligand. The Cs—O bond range is 3.023 (3)–3.368 (4) Å and the Cs...Cs separation within the dinuclear unit is 4.9265 (6) Å. The polymeric sheet structure lies parallel to (010) with the water molecule and the phenol group involved in intra-polymer O—H...Ocarboxylhydrogen-bonding interactions.