Dibutyltin benzoin benzoyl hydrazone complex I [C6H5(O)C=N-N=C(Ph)CH(Ph)O](2)[(n-Bu)(2)Sn](2) and dibutyltin benzoin salicyl hydrazone complex II [2-(OH)-C6H4(O)C=N-N=C(Ph)CH(Ph)O](2)[(n-Bu)(2)Sn](2) were synthesized and characterized by IR, H-1, C-13 and Sn-119 NMR spectra, FIRMS, elemental analysis and thermal stability analysis, and the crystal structures were determined by X-ray diffraction. The crystal of complex I belongs to monoclinic system, space group P2(1)/n with a = 11.1942(8), b = 10.4754(7), c = 23.6700(17) angstrom, beta = 101.529(2)degrees, Z = 2, V = 2719.6(3) angstrom(3), D-c...