A Self‐assembly of New Cobalt Coordinating Polymer Based on Fluorinated Secondary Building Unit and Pyrazine

The direct two‐step synthesis of new coordination polymer [Co2(pyz)(tfa)2(dmf)6(H2O)][Co3(μ3‐F)(tfa)6(Htfa)2(pyz)(dmf)]2·2dmf, (where pyz = pyrazine, Htfa = trifluoroacetic acid, dmf = dimethyl formamide) containing the fluoro‐centered secondary building block [Co3(μ3‐F)(tfa)6], is reported. The substance characterization using single‐crystal XRD, powder XRD, IR‐spectroscopy and thermogravimetry was performed. SCXRD data revealed the presence of cationic and anionic subsystems, both containing cobalt(II) ions and pyrazine bridging ligands. The magnetic proper‐ties of the compound were collected and discussed. Temperature dependence of magnetic susceptibility shows Curie – Weiss like behavior at all studied temperatures.