Study on pesticide activities of four ligands and their transition metal complexes with 8-mercaptoquinoline and pyridine terminal groups

Abstract Four kinds of thioether ligands (Q1–Q4) and their 21 kinds of transitional metal complexes have been synthesized, in which two new complexes have been prepared and tested. Some potential laws were obtained by comparing the pesticide activities of four kinds of ligands and their 21 kinds of transitional metal complexes based on the difference of metal ions, anions and spatial structures. The results revealed that the complexes with Ag + ion had very outstanding pesticide activities which might be related to the structure unit of a bimetallic ring and the bacteriostatic effects of anions decreased in the order Cl −  > BF 4 −  > ClO 4 −  = CF 3 CO 2 −  > CF 3 SO 3 −  > NO 3 − . Compared with ligands Q1–Q4, the inhibitory effect of ligand Q1 was the best, which might be connected to the stable spatial structure.