| 摘要 |
<p>Perchlorofluoromethanes are prepared by heating carbon disulphide with a fluorochloroarsenic complex [ASCl4]+[ASF6]- or a fluorochloro antimony complex [SbCl4]+[SbF6]-. The product is usually a mixture of the mono-, di- and tri-fluoro-chloromethanes. The reaction may be effected at atmospheric pressure, suitably at 80-100 DEG C., or, preferably, at super-atmospheric pressures at temperatures above 100 DEG C. The arsenic or antimony complex may be made in situ by passing chlorine into a mixture of carbon disulphide and arsenic or antimony trifluoride. Examples are provided.</p> |
