Poly[(μ(6)-4-amino-3,5,6-trichloro­pyridine-2-carboxyl­ato)aqua­caesium]

In the structure of the title complex, [Cs(C(6)H(2)Cl(3)N(2)O(2))(H(2)O)](n), the caesium salt of the commercial herbicide picloram, the Cs(+) cation lies on a crystallographic mirror plane, which also contains the coordinating water mol­ecule and all non-H atoms of the 4-amino-3,5,6-trichloro­picolinate anion except the carboxyl­ate O-atom donors. The irregular CsCl(4)O(5) coordination polyhedron comprises chlorine donors from the ortho-related ring substituents of the picloramate ligand in a bidentate chelate mode, with a third chlorine bridging [Cs—Cl range 3.6052 (11)–3.7151 (11) Å] as well as a bidentate chelate carboxyl­ate group giving sheets extending parallel to (010). A three-dimensional coordination polymer structure is generated through the carboxyl­ate group, which also bridges the sheets down [010]. Within the structure, there are intra-unit water O—H⋯O(carboxyl­ate) and amine N—H⋯N(pyridine) hydrogen-bonding inter­actions.