Cd(H2O)2[C6H3(COO)2(COOH)] - A Two-Dimensional Coordination Polymer with Cationexchanger Features

What is it about?

Monoclinic single crystals of Cd(H2O)2[C6H3(COO)2(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, beta= 117.897(8)°, V = 2.1230(3) nm3, Z = 8. Cd2+ 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 Cd2+ with [C6H3(COO)2(COOH)]2+ 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.

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