| 摘要 |
PCT No. PCT/GB92/01782 Sec. 371 Date Jun. 13, 1994 Sec. 102(e) Date Jun. 13, 1994 PCT Filed Sep. 29, 1992 PCT Pub. No. WO93/07117 PCT Pub. Date Apr. 15, 1993.Dialkyl SE and TE compounds are prepared by reacting a Na chalcogenide with a alkyl halide in a two-phase system of solvents. |
