Crystal structure of polyμ 2 -aqua-bis(μ 3 -3-carboxylatomethylbenzoato-k 3 O:O:O ″)(μ 2 -di(pyridin-4-yl)sulfane-k 2 N:N ′)dimanganese(II), C 38 H 30 Mn 2 N 4 O 9 | Synapse