title: Preparation and infrared spectra of palladium derivatives of some organophosphorus insecticides.
abstract: The preparation of palladium complexes of phosphorodithioate (Guthion, Ethyl Guthion, Imidan, and Cidial) and phosphorothioate (Fenthion) insecticides is described. The Pd : pesticide ratios in the derivatives are ca. 1 : 1 for the phosphorodithioates and 2 : 1 in the case of Fenthion. The infrared spectra of the derivatives are compared with those of the parent insecticides. Palladium complexation of phosphorodithioates results in a lowering of the PS frequencies by 60-75 cm(-1) and also produces changes in the POC region. Milligram quantities of Thimet, Trithion, and Cidial on thin-layer chromatograms were reacted in situ with sodium tetrachloropalladate(II). The infrared spectra of the compounds recovered from the plate depended greatly on the Pd : pesticide ratio on the spot, and the analytical significance of these results is discussed.
authors.affiliation: Trace Analysis Research Centre, Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada.
authors.forename: T F
authors.initials: TF
authors.lastname: Bidleman
authors.forename: R W
authors.initials: RW
authors.lastname: Frei