The title compounds, 4-(diiodoarsanyl) benzoic acid,(I), and 3-(diiodoarsanyl) benzoic acid,(II), both [As (C7H5O2) I2], which possess a–COOH coordinating group, form molecular crystal structures composed of hydrogen-bonded dimers, the packing differences of which are caused by the relative position of the diiodoarsanyl groups. The para isomer, with Z′= 1, crystallizes in a layered structure with shortened contacts of the As atoms to only the ...
