Several ionic ammonium oxalatotriphenylstannate complexes were synthesized by reacting triphenyltin hydroxide with oxalic acid and an appropriate dialkylamine in a 1:1:1 ratio.  Infrared and nuclear magnetic resonance spectroscopies of the complexes indicated that all the complexes are five-coordinated monomers in both the solid state and in solution.  The tin atom in the anion has essentially a  cis-trigonal bipyramidal geometry with one carboxylate O atom and one phenyl group in the axial position.  The other two phenyl groups and the second carboxylate O atom form the equatorial plane.  The complexes were evaluated against the 2nd instar of the Anopheles stephensi mosquito larvae.  This species of mosquito is responsible for the transmission of human malaria.  Preliminary toxicity results indicated that the complexes were effective against the larvae, however, the effectiveness could not be correlated with the organic group of the amine.

Synthesis, structural determination and larvicidal effects of several ionic dialkylamine triphenyltin oxalates complexes

243rd National Meeting (2012)

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