Poly[μ-aqua-μ(5)-[2-(2,3,6-tri­chloro­phenyl)acetato]-caesium]

In the structure of the title complex, [Cs(C(8)H(4)Cl(3)O(2))(H(2)O)](n), the caesium salt of the commercial herbicide fenac [(2,3,6-tri­chloro­phen­yl)acetic acid], the irregular eight-coordination about Cs(+) comprises a bidentate O:Cl-chelate inter­action involving a carboxyl­ate-O atom and an ortho-related ring-substituted Cl atom, which is also bridging, a triple-bridging carboxyl­ate-O atom and a bridging water mol­ecule. A two-dimensional polymer is generated, lying parallel to (100), within which there are water–carboxyl­ate O—H⋯O hy­dro­gen-bonding inter­actions.