Ionothermal Synthesis of a NaCl‐type Topological Network Based on Trinuclear Cobalt(II) Clusters as Nodes

A new metal-organic network [Co3(tbip)3(H2O)4]·2H2O (1) (H2tbip = 5-tert-butyl-isophthalic acid) was synthesized through the ionothermal reaction of H2tbip, cobalt nitrate, and [bmim]Br ionic liquid ([bmim]Br = 1-butyl-3-methylimidazolium bromide). It exhibits a three-dimensional (3D) framework with NaCl topology based on trinuclear cobalt(II) clusters as nodes. The magnetic studies show that there exist antiferromagnetic interactions between the CoII ions.