[en] A number of mixed ligand complexes of the type [Co(en)₂(Im)Cl]Cl₂(Im = imidazole or a substituted imidazole) have been synthesized by reaction of trans-[Co(en)₂Cl₂]Cl with the imidazole ligands. Electrical conductivity measurements support the ionic (1:2) formulation of the compounds, the electronic spectra is in agreement with an octahedral stereochemistry, and the IR and NMR (¹H and ¹³C) spectra strongly favour the cis configuration for the isolated complexes, [Co(en)₂(Im)Cl]Cl₂. Trans-[Co(en)₂Cl₂]Cl reacts with KNCS to form cis-[Co(en)₂(NCS)₂]Cl, the crystal structure of which is briefly reported. This lends additional support in favour of the probable cis configuration of the above complexes. (orig.)