Iron(II) and nickel(II)-thiocyanato complexes of 1-alkyl-2-(arylazo)imidazole: single crystal X-ray structure of [Fe(MeaaiEt)2(NCS)2] (MeaaiEt = 1-ethyl-2(p-tolylazo)imidazole) and [Ni(MeaaiMe)(NCS)2(H2O)2] · 2DMF (MeaaiMe = 1-methyl-2(p-tolylazo)i

Fe(II) and Ni(II) complexes of arylazoimidazoles are described as their thiocyanato derivatives. Iron(II) forms bis-chelated cis-(NCS)2 monomer, while nickel(II) gives monochelated trans-(NCS)2, cis-(H2O)2 hydrogen bonded dimer with DMF. The hydrogen bonded dimer unit of nickel complex undergoes π-π interaction forming a 3D supramolecule.