Synthesis of trans-1,4-cyclohexanedisulfonic acid and its zinc salt - A belt-like metal-organic coordination polymer with tetrahedrally and octahedrally coordinated zinc ions

Diastereomerically pure trans-1,4-cyclohexanedisulfonic acid H2CDS was prepared in three steps from 1,4-cyclohexanediol (cis/trans-mixture) as a new linker molecule for metal-organic coordination polymers. The crystalline zinc salt contained two molecules DMF per formular unit. Infinite polymeric belts were observed in the solid state structure of [Zn(CDS)(dmf)(2)]. These flat belts were formed by connecting two chains of Zn(dmf)-CDS-polymers bearing tetrahedrally coordinated Zn2+ ions in one chain and octahedrally coordinated Zn2+ centers in the second. Thermal analysis of this polymer revealed its stability up to 400 degrees C, above which it decomposed cleanly under formation of crystalline ZnO. (C) 2010 Elsevier B.V. All rights reserved.