Chlordane photoalteration products. Preparation and identification

Photolysis of cis-chlordane: identification of two isomers of cis-photochlordane

“…The fragment with highest mass appeared at m/e 371 which was due to loss of a chlorine from the molecular ion (M+ -Cl). The remainder of the spectra in all cases were in conformity with previous studies on similar molecules (Benson et al, 1971; Knox et al, 1973;Onuska and Comba, 1975), involving further losses of Cl, HC1, or their com- was present at m/e 373. The similarity of mass spectra in conjunction with identical retention times on GLC columns and closeness of behavior on thin-layer plates (Table II) showed that PC I and PC II were isomeric molecules.…”

Metabolic fate of cis-photochlordane in the rat. 1. Excretion, tissue distribution, and preliminary characterization of metabolites

“…PC arises from cis-chlordane (Figure 1,1) by intramolecular rearrangement which offers several possibilities. Benson et al (1971) proposed two alternate configurations of the molecule (Figure 1, II and III) but it was not possible to decide which of the two isomeric forms was produced in their experiments. Knox et al (1973) suggested C2 to C5 bridging (Figure 1, II) in the molecule.…”

“…(Podowski et al, 1979). Exposure of cis-chlordane to UV irradiation or sunlight (Benson et al, 1971) results in the formation of the photoisomer, cis-photochlordane, which has higher acute toxicity than the parent compound to several vertebrate species (Podowski et al, 1979). Whereas the fate of photoisomers of other cyclodienes has been studied in various organisms [photodieldrin in the rat (Dailey et al, 1970(Dailey et al, ,1972; Reddy and Khan, 1974), mouse, housefly, (Reddy and Khan, 1974), rabbit (Reddy andKhan, 1975, 1977a), and rhesus monkey (Nohynek et al, 1979); photoisodrin in mouse and houseflies ( Structural formulae of cis-chlordane (I) and some of its possible photoisomers bridge; III, C2-C6;…”

Capillary gas chromatography of pesticide residues in foods: Application of a split/splitless inlet system

“…Shown in Figure 4-B are some of the major peaks of technical chlordane. Figure 5displays a mixture of degraded technical chlordane [22,23] and degraded toxaphene [24,25]. In this sample, toxaphene was determined by auto-integration on a packed column.…”