| 摘要 |
A method for preparing halogenated alkanes and alkenes which comprises reacting by contacting, for 0.005 to 0.1 second at a temperature of 675 DEG C. to 850 DEG C., a halogenating agent of the formula CClxBr4-x, wherein x is an integer from 0 to 4, with a compound of the formula R2CH2, wherein each R is H, Cl or Br, with or without the presence of inert gases. The utilization of the above conditions prevents the formation of large amounts of undesirable tars.
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