Schiff bases of thiosemicarbazide with piperonal(HPT) or 6-nitropiperonal (HNPT) and their Mo(Ⅵ) complexes have been synthesized. The synthesized compounds have been characterized by elemental analysis,IR, 1HNMR,MS,UV/vis,and molar conductivity. The six-coordinate structure with [Cis-MoO 2]^2+ group in the complexes is proposed on the basis of spectroscopic characterization. The actions of the Mo(Ⅵ) complexes on the cell survival rate of mung bean sprouts have been investigated.The results indicate that the complexes have the actio...