Studies on some bulky triorganotin complexes of germatranyl‐substituted carboxylic acids

Eleven tris(2‐methyl‐2‐phenylpropyl)tin as well as four methyl bis[(phenyldimethylsilyl)methyl]tin β‐germatranylpropionates have been synthesized, and their structures were characterized by elemental analyses, IR, multinuclear (1H, 13C, 119Sn) NMR, Mössbauer, and MS spectroscopies. All the spectroscopic studies suggest a tetrahedral geometry for the bulky triorganotin carboxylates. The preliminary bioassays have shown that most of the compounds have good acaricidal activity.