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A supramolecular compound, [Co(2,2′-bipy)(H_ 2 O)_ 4 ][trans-1,4-chdc] (compound 1) (2,2′-bipy=2,2′-bipyridine, 1,4-chdcH_ 2 =1,4-cyclohexanedicarboxylic acid), was synthesized and characterized by single-crystal X-ray diffraction analysis, IR spectrometry, TG analysis, and elemental analyses. Single-crystal X-ray diffraction analysis revealed that [Co(2,2′-bipy)(H_ 2 O)_ 4 ]~ 2+ units and adjacent 1,4-chdc~ 2- formed a single layer by hydrogen bonding and electrostatic interactions along the ac-plane, and two symmetry-related single layers interacted with each other by hydrogen bonding, resulting in a double layer, which further formed a 3-D structure by π-π stacking. The most attractive structural feature of compound 1 is that 1,4-chdc~ 2- possesses only trans-conformation although there are both cis- and trans-conformations in the raw material.
A supramolecular compound [(2,2’-bipy) (H 2 O) 4] [trans-1,4-chdc] 1,4-cyclohexanedicarboxylic acid, was synthesized and characterized by single-crystal X-ray diffraction analysis, IR spectrometry, TG analysis, and elemental analyzes. Single-crystal X-ray diffraction analysis revealed that [ Co (2,2’-bipy) (H_2O) _4] ~ 2+ units and adjacent 1,4-chdc ~ 2- formed a single layer by hydrogen bonding and electrostatic interactions along the ac-plane, and two symmetry -related single layers interacted with each other by hydrogen bonding, resulting in a double layer, which further formed a 3-D structure by π-π stacking. The most attractive structural feature of compound 1 is that 1,4-chdc ~ 2- possesses only trans-conformation therefrom there are both cis- and trans-conformations in the raw material.