Two cobalt(ll) supramolecular isomers based on N'N-bis(pyridin-3-yl)oxalamide induced by the molecular orientation of lattice DMF molecules

摘要

Supramolecular isomerism for coordination networks refers to the existence of different architectures having the same building blocks and identical stoichi-ometries. For a given building block, different arrangements can lead to the formation of a series of supramolecular isomers. Two one-dimensional Co11 coordination polymers based on Ar,Ar'-bis(pyridin-3-yl)oxalamide (BPO), both cfltewfl-poly[[[dichloridocobalt(II)]-bis[/x-Af,Af/-bis(pyridin-3-yl)oxalamide-/(:2Af:Af/]] dimethylformamide disolvate], {[CoCl2(Ci2H10N4O2)2]-2C3H7NO}n, have been assembled by the solvothermal method. Single-crystal X-ray diffraction analyses reveal that the two compounds are supramolecular isomers, the isomerism being induced by the orientation of the dimethylformamide (DMF) molecules in the crystal lattice.