Abstract
Abstract The 1:1 interaction of the diastereopure Schiff bases (1S,2S)-bis(acetylacetone)-cyclohexanediimine ( L 1 ) and (1R,2R)-bis(acetylacetone)cyclohexanediimine ( L 2 ) with CdI 2 yields the new helical metal coordination polymers [Cd L 1 I 2 ] n ( 1 ) and [Cd L 2 I 2 ] n ( 2 ). The respective X-ray structures, as expected, confirmed 1 and 2 to be enantiomeric, existing as right-handed ( P ) and left-handed ( M ) helical chains in which both L 1 and L 2 are formally present in their (unusual) uncharged ketoamine form, with the (protonated) amine nitrogens not coordinated. The Cd(II) centres in 1 and 2 display distorted tetrahedral coordination geometries being bound to two iodo ligands and two oxygen donor atoms from individual ketoamine domains belonging to different Schiff base ligands.
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