Acta Phys. -Chim. Sin. ›› 1987, Vol. 3 ›› Issue (04): 412-417.doi: 10.3866/PKU.WHXB19870415

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A STUDY OF ESR SPECTRA OF ACTIVE RADICALS GENERATED IN THE PHOTOCHEMICAL HYDROGEN ABSTRACTION REACTION BETWEEN ETHYLENE TETRACHLORIDE AND HYDROCARBON OR ALCOHOL

Liu Yang; Xu Guangzhi   

  1. Institute of Chemistry; Academia Sinica; Beijing
  • Received:1986-03-17 Revised:1986-12-18 Published:1987-08-15

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Abstract: Active radicals generated during the photochemical hydrogen abstraction bet- ween ethylene tetrachloride and hydrocarbon or alcohol have been studied with the combination of ESR spectroscopy and spin trapping technique, The results show that:
1. CCl_2=CCl and Cl have been formed during the photolysis of CCl_2=CCl_2. Cl further added to C_2Cl_4 to form CCl_3-CCl_2 radical.
2. CCl_2=CCl(or Cl) abstracts hydrogen from methylene group and tertiary carbon of CH_3(CH_2)_nOH(n=3, 7), and (CH_3)_2CH(CH_2)_nOH(n=1,2), to form CH_3-(CH_2)_(n-1)CHOH and (CH_3)_2C(CH_2)_nOH respectively.
3. CCl_2=CCl (or Cl) abstracts hydrogen from methylene group and tertiary carbon of CH_3(CH_2)_nCH_3 (n=3,4,5,6), C_6H_5CH_2CH_3 and (CH_3)_2CH(CH_2)_nCH_3(n=1,4), (C_2H_5)_2CHCH_3, C_6H_5CH(CH_3)_2, to form CH_3(CH_2)_mCH(CH_2)_(n-m-1)CH_3, C_6H_5-CHCH_3 and (CH_3)_2C(CH_2)_nCH_3, (C_2H_5)_2CCH_3, C_6H_5C(CH_3)_2.