Abstract: Seventeen tris(2-methyl-2-phenyl propyl)tin aryloxyacetates were synthesized by the reaction of corresponding aryloxyacetic acids and tris(2-methyl-2-phenyl propyl)tin hydroxide. The IR,¹HNMRand ¹³CNMR spectra of these compounds were studied. The data of IRindicate that these compounds are four-coodinated monomeric organotin compounds.These compounds have a good acaricidal activity.

Key words: Tris(2-methyl-2-phenyl propyl)tin aryloxyacetate, Tris(2-methyl-2-phenyl propyl)tin hydroxide, Aryloxyacetic acid, Acaricidal activity