Structural characterization of a series of new organically templated chained thiocyanato(halo)cadmates

Abstract

The room-temperature self-assemblies between CdX₂, NH₄SCN and organic N-heterocyclic/diamine molecules in acidic C₂H₅OH/H₂O solutions produced six organically templated chained thiocyanato(halo)cadmates [H₂bp][CdCl₂(SCN)₂] 1, [H₂bp][Cd(SCN)₄] 2, [H₂bpp][Cd₃Br(SCN)₇] 3, [H₂bpy][CdBr₂(SCN)₂] 4, [H₂bpe][Cd(SCN)₄] 5 and [H₂dach][CdCl₄] 6 (bp = 4,4′-bipiperidine; bpp = 1,3-bis(4-piperidyl)propane; bpy = 4,4′-bipyridine; bpe = 1,2-bis(4-pyridyl)ethane; dach = 1,4-diaminocyclohexane). Although the organic N-heterocyclic/diamine molecules are diprotonated, they still act as the bridges to extend the inorganic anionic chains into 2-D or 3-D supramolecular networks via the weak hydrogen-bonded interactions with N atoms as the donors/acceptors.