An organic–inorganic hybrid compound containing imidazolium cations and a one-dimensional lithium hexacyanidocobaltate-based anionic framework

摘要

An organic–inorganic hybrid compound, catena-poly[bis(3H-imidazol-1-ium) [[tetracyanido-κ4C-cobalt(III)]-μ-cyanido-κ2C:N-[diaqualithium(I)]-μ-cyanido-κ2N:C]], {(C3H5N2)2[CoLi(CN)6(H2O)2]}n, was synthesized by the reaction of Li3[Co(CN)6] with imidazolium chloride in aqueous solution. The compound crystallizes in the monoclinic space group C2/c (data collected at 273?K). In the crystal structure, neighbouring [Co(CN)6]3? anionic units are linked by Li+ cations through the cyanide groups in a trans mode, forming a one-dimensional zigzag chain structure extending along the c axis. A three-dimensional supramolecular network is formed through hydrogen-bonding interactions and is further stabilized by weak CN...π interactions between the cyanide groups and the imidazolium cations.