中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
六氯-1,3-丁二烯 | Hexachlorobutadiene | 87-68-3 | C4Cl6 | 260.762 |
1,1,2,3-四氯-1,3-丁二烯 | 1,1,2,3-tetrachloro-1,3-butadiene | 921-09-5 | C4H2Cl4 | 191.872 |
Previous reports on the thermal or CO2-laser induced decomposition of trichloroethylene have identified only one condensible product, hexachlorobenzene (in addition to HCl and mono- and dichloroacetylene). We have found that trichloroethylene vapor exposed to cw irradiation on the P(24) line of the (001 - 100) band of the CO2 laser at incident power levels from 8 - 17 W produces numerous products, of which the 13 major ones have been identified using IR, GC/MS, GC/FTIR, and NMR methods. All of these products have 4, 6, or 8 carbons, are highly unsaturated, and are completely chlorinated or contain a single hydrogen. C4HCl5 and C6Cl6 isomers (three of each) account for S 55% to 85% of total products (based on peak areas in the total ion chromatograms in GC/MS runs), depending on reaction conditions. In addition to characterizing the products, we discuss the dependence of the product distribution on laser power, irradiation time, and cell geometry, and we outline a possible mechanism.