Description:
<jats:title>Abstract</jats:title><jats:p><jats:bold>Cd(H<jats:sub>2</jats:sub>O)<jats:sub>2</jats:sub>[C<jats:sub>6</jats:sub>H<jats:sub>3</jats:sub>(COO)<jats:sub>2</jats:sub>(COOH)] ‐ A Two‐Dimensional Coordination Polymer with Cationexchanger Features</jats:bold></jats:p><jats:p>Monoclinic single crystals of Cd(H<jats:sub>2</jats:sub>O)<jats:sub>2</jats:sub>[C<jats:sub>6</jats:sub>H<jats:sub>3</jats:sub>(COO)<jats:sub>2</jats:sub>(COOH)] have been prepared in aqueous solution at 80 °C. Space group C2/c (no. 15), a = 1973.0(2), b = 910.74(7), c = 1336.81(10) pm, β = 117.897(8)°, V = 2.1230(3) nm<jats:sup>3</jats:sup>, Z = 8. Cd<jats:sup>2+</jats:sup> is coordinated in a moderately distorted pentagonal bipyramidal fashion by five oxygen atoms stemming from the monohydrogentrimesinate anions in the equatorial plane and two water molecules in the apical positions (Cd–O 224.0(2) – 255.0(2) pm). The connection of Cd<jats:sup>2+</jats:sup> with [C<jats:sub>6</jats:sub>H<jats:sub>3</jats:sub>(COO)<jats:sub>2</jats:sub>(COOH)]<jats:sup>2−</jats:sup> yields a two‐dimensional coordination polymer. The atoms of the monohydrogentrimesinate anion form in good approximation a common plane. Thermogravimetric analysis in air shows that the dehydrated compound is stable up to 390 °C. Further decomposition yields CdO.</jats:p>