Preparation of cyanogen iodide
To the round bottom flask fitted with dropping funnel containing 100 ml 5% aqueous solution of sodium cyanide, stirrer, inlet and outlet tubes for gas 12 g iodine and 20 g water are placed. The reaction mixture is stirred and 50 ml of the sodium cyanide solution are added slowly drop-wise. The NaI formed in the reaction dissolves the iodine and the liquid in the flask is continuously decolorized. When the 50 ml sodium cyanide solution have been added, a slow current of chlorine is passed into the flask, and while continuing to stir the liquid the other 50 ml cyanide solution are added from the dropping-funnel at such a rate that there is always an excess of iodine present. The current of chlorine is then stopped and a little more sodium cyanide is added. Cyanogen iodide is then extracted with ether, the ethereal extract dried over calcium chloride and filtered. The ether distilled off and a crystalline residue of cyanogen iodide collected yielding 80-85% of theoretical. Cyanogen iodide forms white crystals which gradually decompose. It melts at 140-146° C. Cyanogen iodide dissolves slightly in cold water, soluble in alcohol and ether.
The war gases chemistry and analysis, by M. Sartory, 193-194, 1939.
CYANOGEN IODIDE, Iodine cyanide, carbononitridic iodide, Iodocyanide, Jodcyan, cyanic iodide, Iodine cyanide (I(CN)), Iodine monocyanide, Cyanogen monoiodide, 506-78-5, HSDB 6328, EINECS 208-053-3, BRN 1697297, AI3-28744, QMbDkDfp@, CYANOGENIODIDE, AC1L1VAD, AC1Q4P4B, UNII-81ESV254UF, 81ESV254UF, WPBXOELOQKLBDF-UHFFFAOYSA-N, LS-84142, FT-0654480, 4-03-00-00093 (Beilstein Handbook Reference), A828244, S14-1188