Twenty novel methyldicyclohexyltin carboxylates were prepared and their structurres were characterized with IR, NMR and X-ray diffraction. The results show that the methyldicyclohexyltin fattycarboxylates are five coordinate, carboxylate-bridged polymers, while are aromatic carboxylates are four coordinate. The results of bioassay indicate that these compounds are of high acaricidal, fungicidal and herbicidal activitives.

Key words: BIOLOGICAL ACTIVITY, X-RAY DIFFRACTION ANALYSIS, ACARICIDES, HERBICIDES, STRUCTURE, ORGANO TIN COMPOUNDS