Caesium propano­ate monohydrate

Caesium propano­ate monohydrate, Cs(+)·C(3)H(5)O(2) (−)·H(2)O, is composed of two symmetry-independent Cs(+) cations, which are situated on the special position 4e of space group P [Image: see text]2(1) m, one symmetry-independent propano­ate mol­ecule in a general position and a pair of water mol­ecules also situated on special position 4e. Two pairs of these symmetry-independent cations, four propano­ate mol­ecules and two pairs of symmetry-independent water mol­ecules form a repeat unit. These units form columns that are directed along the c axis and possess symmetry mm2. There are four such columns passing through each unit cell. Each column is inter­connected to its neighbours by four bifurcated three-centred O(w)—H⋯O(p) (w = water, p = propano­ate) hydrogen bonds of moderate strength. There are also four intra­molecular O(w)—H⋯O(p) hydrogen bonds of moderate strength within each column. One Cs(+) cation is coordinated by six oxygen atoms (two water and four carboxyl­ate) in a trigonal–prismatic geometry, while the other Cs(+) cation is coordinated by four water and four carboxyl­ate O atoms in a tetra­gonal–prismatic arrangement.