Thiocyanate from sodium

Alkyl thiocyanates. From potassium or sodium thiocyanate and the alkyl halide in alcoholic solution, for example ... 

Sodium or potassium hydrogen sulfite reacts with several thiiranes to give disulfides of /3-mercaptosulfonic acid salts (76EGP122086). Potassium thiocyanate in dimethylformamide or aqueous ethanol isomerizes thiiranes (Scheme 84) (72CJC3930). 1,2-Dithiols are obtained by treatment of thiiranes with NaBH2S3 obtained from sodium borohydride and sulfur (73TL1401). 

Among phosphorus insecticides containing also nitrogen and sulphur we may mention 00 -diethyl-/S-/ -diethylaminoethyl phosphorothiolate (X). It was prepared (i) from diethyl phos-phorochloridate1 and sodium / -diethylaminoethyl mercaptide, (ii) from sodium diethyl phosphite and / -diethylaminoethyl thiocyanate, (iii) by the isomerization of OO -diethyl-O"-/ -diethylaminoethyl phosphorothionate (XI) obtained from / -diethylaminoethoxide and diethyl phosphorochloridothionate. 

Figure 6. Elution profile of protein, radioactivity, and thiocyanate from a Sepha-dex G-25 column of reconstituted monooxygenase system from rat liver that had been incubated with [ 5] parathion. The 5-mL incubation mixture contained 20 nmol Cytochrome P-450 (specific activity 16.4 nmol/mg protein), 5 units NADPH-Cytochrome c reductase, 600 fig dilauroyl L-3-phosphatidylchoUne, 600 fig sodium deoxycholate, and 1 X IO M p 5] parathion. The remainder of the incubation mixture is described in Figure 4. The incubation time was 5 min. One-milliliter fractions were collected. The radioactivity (x) represents cpm/0.1 mL. The OOggo (o) was measured on each 1-mL fraction (20).

Methanesulfonyl chloride has been prepared by the chlorination of methyl thiocyanate, S-methylthiourethan, sodium methyl thiosulfate or S-methylisothiuronium sulfate from sodium methanesulfonate by the action of phosphorus penta-chloride, phosphorus oxychloride, or benzotrichloride from methanesulfonic acid by the action of phosphorus pentachloride or by the reaction of methylmagnesium iodide with sulfuryl chloride. ... 

The major reactions are complicated by a number of minor or secondary reactions, and by impurities in the raw materials. As a result the black ash may contain 1 to 2 per cent, of sodium silicate to If per cent, of sodium aluminate 1 per cent, of sodium ferrous sulphide small proportions of sodium cyanide and thiocyanate derived from the nitrogen of the coal a relatively small amount of ultramarine etc. Proposals to use barium carbonate, etc., in place of limestone in the black-ash process are indicated in connection with the preparation of sodium carbonate from sodium sulphide. 

Evolution of nitrogen from sodium azide-iodine mixture is brought about by traces of thiocyanate, and the latter may readily be detected by this means in the presence of most inorganic oxy-acids and the common organic acids.2 Sulphides and thiosulphates interfere (see pp. 65, 205) and must previously be removed by means of mercuric "hloride. 

Figure 2. Ion chromatographic separation of a series of anions on polymer-based column with adsorbed decyl-2.2.2 using gradient capacity from sodium hydroxide to lithium hydroxide aqueous eluent. Anions 1) fluoride 2) acetate 3) chloride 4) nitrite 5) bromide 6) nitrate 7) sulfate 8) oxalate 9) chromate 10) iodide 11) phosphate 12) phthalate 13) citrate 14) thiocyanate (from refs. 13,14)...

Treatment of symmetrically substituted bis(arylmethylthio)alkynes with either IC1 or Br2 and in the strict absence of water promotes cyclization to 1//-2-benzothiopyrans (Scheme 129). Initial formation of a cyclic halonium species induces the electrophilic ring closure. In the presence of nucleophiles, ipso attack is favored and a spirocyclohexa-dienone results. The alkynes are accessible from arylmethyl thiocyanates and sodium acetylide <1998JOC4626, 2003EJ047>. 

Iron(n) salts mediated the coupling of trialkylboranes with KSGN to give RSCN via a radical process.553,554 Stereochemically pure ( )-l-thiocyanato-alkenes or ( )-l-azide-alkenes were obtained from alkynes when hydro-boration with disiamylborane was followed by reaction with potassium thiocyanate or sodium azide in the presence of copper(n) nitrate, copper(n) acetate, and small amount of water in polar aprotic solvent (Equation (116)).555... 

Scheme 8.18 Sml2- H20-mediated synthesis of alkanethiols from sodium alkyl thiosulfates and alkyl thiocyanates.

The films formed from potassium thiocyanate solutions behaved differently from those formed from sodium chloride solutions. At the lowest salt concentration examined, 4 X 10"4 mole/dm3, the film had a thickness of 975 A, clearly a first black film. With increasing salt concentration the film thickness decreased and reached 60 A at a thiocyanate concentration of 5 X 10 1 mole/dm3 it remained at this thickness as the salt concentration was increased to 1 mole/dm3. This corresponded to the second black film thickness obtained with the films in sodium chloride solutions, and in this state the films were quite stable. The considerably thicker films formed in the presence of the thiocyanate ion indicate a stronger double layer repulsion effect than with chloride and hence a stronger adsorption of the thiocyanate ion to the film surface. These re-... 

Sulfonyl thiocyanates undergo free radical addition to olefins or acetylenes to give p-thiocyanate sulfones in fair to good yields (equation 111)97. p-Toluenesulfonyl thiocyanate (224) is prepared from sodium p-toluenesulfinate and thiocyanogen in benzene... 

As complex forming reagents that form water soluble complexes with Ag(I), ammonia NH, potassiiun thiocyanate KSCN, sodium trioxosulphidosulphate(VI) Na S O, ethanediamine-1,2 H N-CH -CH -NH, 2-aminoethanol H N-CH -CH -OH, and 3-(2-hydroxyethyl)-3-azapenthanediol-l,5 N(CH -CH -OH), were used. At the Dnst stage of given processing of Ag-GM obtained, conversion of Ag-GlM into Ag pe(CN) ]-GlM occurred, on the second stage, reduction of Ag [Fe(CN) ]-GlM with Sn(ll) from elemental silver took place. And so, peculiar re-precipitation of elemental silver into gelatin matrix occurred incidentally. 

Analysis of Reagent Purity IR, UV, elemental analysis. Preparative Methods the title reagent 1 Is prepared from the corresponding alkyl thiocyanate and sodium azide through a [2+3] cycloadditlon under phase transfer catal3rtlc conditions (eq 1). The ratio of the solvent (water to toluene) as well as the reaction temperature are Important factors In obtaining preparative... 

Preparative Methods this reagent can be readily prepared from methyl thiocyanate and sodium azide in the presence of ammonium chloride in anhydrous DMF. Alternatively, it can be prepared by the reaction of methyl thiocyanate and sodium azide in water with zinc bromide as the catalyst. ... 

C. W. Nam, Y. H. Kim, and S. W. Ko, Blend fibers of polyacrylonitrile and water-soluble chitosan derivative prepared from sodium thiocyanate solution. /. Appl. Polym. Sci. 82, 1620-1629(2001). 

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