A Pair of Co Supramolecular Isomers Based on Flexible Bis-Pyridyl-Bis-Amide and Angular Dicarboxylate Ligands.

Thermal reactions of cobalt(II) salts with flexible -bis(pyrid-3-ylmethyl)adipoamide () and angular 4,4'-sulfonyldibenzoic acid (HSDA) in HO and CHOH afforded a pair of supramolecular isomers: [Co()(SDA)], , and [Co()(SDA)]⋅CHOH⋅HO, . The structure of complex can be simplified as a one-dimensional (1D) looped chain with ligands penetrating into the middles of squares, forming a new type of self-catenated net with the (4⋅5)(4)(5) topology, whereas complex displays a 2-fold interpenetrated 2D net with the rare (4⋅6⋅8⋅10)(4)-2,6L1 topology. While both complexes and display antiferromagnetism with strong spin-orbital coupling, the antiferromagnetism of is accompanied by a cross-over behavior and probably a spin canting phenomenon.