Three new dialkytin complexes, {[o-OH–C6H4(O)C=N–N=C(CH2Ph)COO](n-Bu2Sn)}n (1), {[o-OH–C6H4(O)C=N–N=C(CH2Ph)COO](MeOH)(p-MeC6H5CH2)2Sn}2 (2), and {[o-OH–C6H4(O)C=N–N=C(CH2Ph)COO](EtOH)(C6H5CH2)2Sn}2 (3), were synthesized by reactions of 2-oxo-3-phenylpropionic acid salicyloylhydrazone with the corresponding diorganotin(IV) complex, respectively. All the complexes were characterized by IR, 1H, 13C, 119Sn NMR spectra, elemental analysis, X-ray single crystal diffraction and TGA. For in vitro antitumor activities, complexes were evaluated by...