Two organotin carboxylate compounds, tri(o-bromobenzyl)tin thiophene 2-carboxylate (1) and tri(o-bromo-benzyl)tin cinnamate (2), have been synthesized. Compounds 1 and 2 were characterized by elemental analysis, IR spectroscopy, NMR (1H,13C, and119Sn), thermogravimetric analysis, and single-crystal X-ray diffraction. The study on compounds 1 and 2 has been performed with quantum chemistry calculation and in vitro anticancer activity. The results showed that the tin atoms in compounds 1 and 2 have distorted tetrahedral geometry. Compounds 1 and ...