The reaction of potassium tellurocyanate (prepared in situ) with N-(1-chloroethylidene)arylamines (i.e., 4-RC6H4N = C(CH3)Cl, where R = H, Cl, CH3 and NO2) in DMSO solution gave unexpectedly, after hydrolysis, the corresponding N-(3-(arylamino)butan-2-ylidene)arylamines in 63-78%. Reaction of N-(3-(arylamino)butan-2-ylidene)arylamines with SOCl2 or with Br-2 resulted in the substitution of a halogen on the aromatic rings. The presence of a water molecule within the structure of the synthesized diimines was rationalized theoretically by Density Functional Theory (DFT). All compounds were characterized by elemental analysis, IR, NMR and mass spectroscopic data.