Abstract A simple, efficient, and mild procedure for a solvent-free one-step synthesis of various 4, 4′-diaminotriarylmethane derivatives in the presence of antimony trichloride as catalyst is described. Triarylmethane derivatives were prepared in good to excellent yields and characterized by elemental analysis, FTIR, 1 H and 13 C NMR spectroscopic techniques. The structural and vibrational analysis were investigated by performing ...