The difluorochlorates (I) of Cs, Rb, and K were successfully prepared by the reaction of the coresponding fluorides with chlorine monofluoride or NO(+)ClF2(-). These white crystalline solids are the first known difluorochlorate (I) salts stable at 25 degrees. They decompose exothermically at temperatures higher than 230 degrees. Their composition and structure were established by elemental analysis, IR, and X-ray studies. The salts are ionic, contain linear ClF2(-) anions, and crystallize tetragonally in the alpha-KHF2 lattice type. The unit cell dimensions of CsClF2, RbClF2, and KClF2 are: a = 6. 10 A., c = 7.78 A.; a = 5.88 A., c = 7.23 A.; a = 5.63 A., c = 6.72 A., respectively. Attempts to prepare LiClF2 and CA(ClF2)2 failed, while NaClF2, Ba(ClF2)2, and Sr(ClF2)2 may have formed to a very small extent.

plus-circle Add Review

comment

Reviews