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本文用自由基捕捉剂2,3,5,6-四甲基亚硝基苯(ND)与ESR相结合的方法研究了四氯乙烯光解活泼自由基及其与烃或醇的夺氢反应,结果表明:1.Cl_2C=CCl_2光解首先产生Cl_2C=■Cl及Cl,而又可进一步加成为Cl_2■-CCl_3.2.对于CH_3(CH_2)_nOH(n=3,7)及(CH_3)_2CH(CH_2)_nOH(n=1,2)而言,Cl_2C=■Cl(或Cl)分别夺取其α-碳及叔碳上的氢,以形成CH_3(CH_2)_(n-1)■HOH及(CH_3)_2■(CH_2)_nOH,并为ND所捕获。3.Cl_2C=■Cl(或Cl)分别夺取CH_3(CH_2)_nCH3(n=3,4,5,6),C_6H_5-CH_2CH_3及(CH_3)_2CH(CH_2)_nCH_3(n=1,4),(C_2H_5)_2CHCH_3,C_6H_5CH(CH_3)_2中亚甲基及叔碳上的氢,以形成CH_3(CH_2)_m■H(CH_2)_(n-m-1)CH_3,C_6H_5■HCH_3及(CH_3)_2■(CH_2)_nCH_3,(C_2H_5)_2■CH_3,C_6H_5■(CH_3)_2.
In this paper, free radical scavenger 2,3,5,6-tetramethylnitrosobenzene (ND) combined with ESR method tetrachlorethylene photodegradation of free radicals and hydrogenation reaction with hydrocarbons or alcohols The results showed that: 1. Cl_2C = Cl and Cl, which could be further added to Cl_2-CCl_3.2 by photolysis of Cl_2C = CCl_2. For CH_3 (CH_2) _nOH (n = 3,7) and (CH_3) (CH_2) _nOH (n = 1, 2), Cl_2C = Cl (or Cl) captures hydrogen on the α-carbon and tertiary carbon, respectively, to form CH_3 (CH_2) _ And (CH_3) _2 ■ (CH_2) _nOH, and captured by ND. 3. Cl_2C = Cl (or Cl) captures CH_3 (CH_2) _nCH_3 (n = 3,4,5,6), C_6H_5_CH_2CH_3 and (CH_3) _2CH (CH_2) _nCH_3 (CH_2) _m ■ H (CH_2) _ (nm-1) CH_3, C_6H_5 ■ HCH_3 and (CH_3) _2 ■ (CH_2) _2CHCH_3, C_6H_5CH (CH_3) CH_2) _nCH_3, (C_2H_5) _2 ■ CH_3, C_6H_5 ■ (CH_3) _2.