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. Theparaisomer, withZ′ = 1, crystallizes in a layered structure with shortened contacts of the As atoms to only the arene rings of adjacent molecules. In contrast, themetaisomer, withZ′ = 3, forms separate rectangular blocks of three ribbons, each composed of dimeric molecular units positioned almost directly above each other and with the As atoms possessing only two As...I contacts to the I atoms of neighbouring molecules.
标题化合物 4-(二碘胂基)苯甲酸 (I) 和 3-(二碘胂基)苯甲酸 (II) 都含有一个 -COOH 配位基团 [As(C7H5O2)I2],它们形成由氢键二聚体组成的分子晶体结构,其堆积差异是由二碘胂基团的相对位置造成的。Z′ = 1 的对映体结晶为层状结构,As 原子与相邻分子的炔环的接触缩短。相反,Z′=3 的四异构体则形成由三条带组成的独立矩形块,每个矩形块都由二聚体分子单元组成,这些分子单元几乎都位于彼此的正上方,As 原子与相邻分子的 I 原子之间只有两个 As...I 接触。