| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 1,2,3,4,7,7-Hexachlor-bicyclo<2.2.1>hepten-(2) | 22039-38-9 | C7H4Cl6 | 300.827 |
The conversion of the hexachloronorbornene-moiety of persistent cyclodiene pesticides has been studied by hydrolysis- and photolysis (UV) reactions. The chemical changes have been monitored by means of a microtitration method for chloride ions and electron capture gas chromatography. The 2,3-disubstituted hexachloronorborn-5-enes give a comparably easy loss of 1 mole chloride ions per mole compound if one of the substituents is a hydroxymethylene group, whereas with two carboxylic acid groups in the 2,3-position — that is chlorendic acid — or a further cycle or bicycle — that is endosulfanether or dieldrin — the compounds proved to be very stable. The alkaline stability of aldrin and dieldrin corresponds to their persistence in the ecosystem.