Alcohol Ammonium Thiocyanate

The reaction is carried out at low temperature in aqueous medium and then allowed to stand overnight (221). Ammonium thiocarbamate is prepared from a cold saturated solution of ammonium thiocyanate, which is gradually added to dilute sulfuric acid at 25°C. The liberated carbonyl sulfide is passed into a saturated solution of alcoholic ammonia at about 10°C (221). The fairly low yield indicates that the reaction has not been greatly developed. 

Other types of leaving groups and of nucleophilic reagents also show greater reactivity at the 4-position 2,4-dichloropyrimidine with alcoholic potassium thiocyanate (to 304) and with chemical monodehalogenation (zinc and ammonia or ammonium chloride), 2,4- lj, 3fi )-pyrimidinedithione with ammonia or... 

Ammonium sulfide, 3, n Ammonium thiocyanate, 7, 48 Ammonolysis, 4, 3 7, 16 o-Amyl alcohol, 1, 4, 10 Amyl alcohol, active, 7, 77 mo-Amyl Bromide, 1,1, 2, 4, 10 w-Amyl Methyl Ketone, 7, do -Amyl propiolic acid, 7, 62 Analysis of Benzoylhydroperoxide, 8,32 Analysis of Benzoylperoxide, 8, 31 Anhydro-o-Hydroxymercoribenzoic Acid, 7, 3... 

I-A1ON0-2-NAPHIH0L-4-SULE0NIC acid, 11, 72 16, 91 17, 91 Aminonaphtholsulfonic acids, coupling to form azo dyes, 16,16 p-Aminophenol, 16, 39 Aminopiperole, 16, 6 /3-Ahinopropionic acid, 16, 1 4-Aminoveratrole, 16, 4 Ammonium dichromate, 16, 74 Ammonium formate, 17, 77 Ammonium thiocyanate, 16, 74 Ammonium vanadate, 13, 1 to w-Amyl alcohol, IS, 17 hri.-Amyl alcohol, 13, 68 -Amylbenzene, 10, 4 -Amyl borate, 13, 17 -Amyl bromide, 16, 41 iso-Amyl iodide, 13, 62 n-Amyl iodide, 13, 62 n-Amybnagnesium bromide, 16, 41... 

Procedure Weigh accurately about 0.2 g of chlorobutol in a flask and dissolve in 5 ml of alcohol. Add to it 5 ml of sodium hydroxide solution, and boil under a reflux condenser for 15 minutes. Cool, dilute with 20 ml of DW, add 5 ml of nitric acid, 1 ml of nitrobenzene and 50 ml of 0.1 N silver nitrate solution. Shake the contents vigorously for 1 minute, add 4 ml of ferric ammonium sulphate solution and titrate the excess of silver nitrate with 0.1 N ammonium thiocyanate solution. Each ml of 0.1N silver nitrate is equivalent to 0.005917 g of C4H7C130. 

Cr en2pn](SCN)3.pi20, is prepared by heating m-diehloro-dicthyl-enediamino-cliromic chloride, [Cr en2Cl2]01, with propylcnediaminc monohydrate on a water-bath for some time until the mass becomes yellow. It is then cooled, treated with a little water, filtered, and a concentrated aqueous solution of ammonium thiocyanate added to the filtrate. Small yellow crystals separate, which are recrystallised from warm water. They are soluble in water and insoluble in alcohol.1... 

Compound Name Ammonium Oxalate Ammonium Oxalate Ammonium Pentaborate Ammonium Pentaborate Zinc Ammonium Chloride Ammonium Perchlorate Ammonium Persulfate Ammonium Persulfate Ammonium Phosphate Ammonium Phosphate Ammonium Thiocyanate Ammonium Thiocyanate Ammonium Silicofluoride Ammonium Stearate Ammonium Sulfamate Ammonium Sulfate Ammonium Sulfide Ammonium Sulfide Ammonium Sulfide Ammonium Sulfite Ammonium Thiocyanate Ammonium Thiocyanate Ammonium Tartrate Ammonium Thiocyanate Ammonium Thiosulfate Zinc Ammonium Chloride Phosphorus, Red Ammonium Sulfamate Amyl Acetate Amyl Acetate N-Amyl Alcohol N-Amyl Alcohol Valeraldehyde Hexanol... 

This analogue is easily prepared by evaporating the equivalent quantities of chromium chloride 6-hydrate and ammonium thiocyanate in aqueous solution to dryness on the steam bath and extracting the residue with absolute alcohol. Evaporation of the alcoholic extract yields the red salt. 

Silver, lead, copper(l). and thallium(I) thiocyanates are insoluble and mercuiy(II), bismuth, and tm(II) thiocyanates slightly soluble. All of these, are soluble in excess of soluble (e.g., ammonium) thiocyanate, forming complexes. Iron(III) thiocyanate gives a blood-red solution, used in detecting either Fe(lll) or thiocyanate in solution, and is extracted from water by amyl alcohol. It is not formed in the presence of fluoride, phosphate and other strongly complexing ions,... 

In the second stage of a representative aqueous process, an aqueous solution of polytyinyl alcohol) is heated with butyraldehyde and an acid catalyst. PVB precipitates from solution as il forms. Because PVB resin precipitates early in the reaction there is a tendency toward high levels of intennolecular acetalization. Cross-linking can be minimized by adding emulsifiers to control particle size or substances like ammonium thiocyanate or urea to improve the solubility of PVB in the aqueous phase. 

The formula of carbon dioxide is C02, that of carbon disulphide CS2 and it is evident that an intermediate substance should exist of the formula COS. This substance is carbon oxysulphide. It is a gas, prepared by heating thiocyanic acid, HSCN, the ammonium salt of il which is produced when ammonia is passed through a mixture of carbon disulphide and alcohol CS2 + 2NHg.Alc = H2S + (NH4) SCN.Alc. On evaporation of the alcohol the ammonium thiocyanate crystallises out. This salt, distilled with sulphuric acid, yields in passing the acid HSCN, which, on account of the high temperature, reacts with water, forming ammonia (which yields ammonium sulphate with the sulphuric acid) and carbon oxysulphide, COS HSCN + H20 = NHS + COS. 

Rhodanine has been prepared by the reaction of chloroacetic acid with ammonium thiocyanate 2 by the action of ethyl chloro-acetate upon ammonium dithiocarbamate in the presence of alcohol and hydrogen chloride 3 by saturating a solution of thioglycolic acid and potassium thiocyanate in absolute alcohol with hydrogen chloride 4 by ring closure of thiocarbamylthio-... 

In carrying out the test a small quantity of standard cobalt sulphate solution is taken, and acidulated with dilute sulphuric acid. Ammonium thiocyanate is then added and the volume of the liquid made up to 10 c.c. A mixture of alcohol and ether is now added until the total bulk is 20 c.c. and the blue colour of the supernatant ethereal layer is compared with that from a solution of the liquid to be tested, and which has been treated in a precisely similar manner.3... 

Ammonium Standard Solution, 849 Ammonium Sulfanilate TS, 850 Ammonium Sulfate, 28 Ammonium Sulfide TS, 850 Ammonium Thiocyanate, 0.1 N, 856 Ammonium Thiocyanate TS, 850 Amyl Acetate, 510 1-Amyl Alcohol, 454, (S3)66 Amylase, 130, (S3)18 a-Amylase, 132, 786 P-Amylase, 132, 786 Amyl Butyrate, 454, 510, (S3)66 Amyl Caprylate, 454 Amylcinnamaldehyde, 454 a-Amylcinnamaldehyde, 454, 605,... 

The 10-mlnute Co82 produced by the Ni82(n,p) reaction has been extracted as the thiocyanate into an organic layer of amyl alcohol-ethyl ether (l l) from a weak hydrochloric acid solution saturated with ammonium thiocyanate and then back-extracted with 6 N ammonia solution (156,208). The 5-2-minute W17 produced by a Ta (p,3n) reaction has also been extracted as the thiocyanate of W(lV) Into ethyl acetate (268). 

Other types of leaving groups and of nucleophilic reagents also show greater reactivity at the 4-position 2,4-dichloropyrimidine with alcoholic potassium thiocyanate ° (to 304) and with chemical monodehalogenation (zinc and ammonia or ammonium chlor-ide), 2,4-(lH,3/f)-pyrimidinedithione with ammonia or amines to give 305, 2,4-(l/f,3 f)-pyrimidinedione thiona-tion o 8 o with phosphorus pentasulfide (of. 126 and 127), pyrimidine with phenyl lithium, and 2,4,6-trichloropyrimidine with several sulfanilamide anions. In the latter reaction, the absence of a... 

Ammonium Chromithiocyanate, (NH4)3[Cr(SCN)6].4H20, is formed by dissolving freshly precipitated hydroxide in ammonium-thiocyanate solution, or by reducing ammonium dichromate wth alcohol and sulphuric acid, neutralising the solution with ammonia, adding ammonium thiocyanate, and boiling for a short time. ... 

Determination of Benzyl Bromide. The determination of this substance may be carried out by the method already described for benzyl chloride. However, according to Van der Laan, it is sometimes more convenient to decompose the substance directly with a measured volume of standardised alcoholic silver nitrate solution and to titrate the excess of the latter with ammonium thiocyanate solution by the Volhard method. 

In practice this determination is carried out by adding to a weighed quantity of the chloropicrin in a small flask fitted with a condenser, an excess of an aqueous-alcoholic solution of sodium sulphite, prepared by dissolving 10 gm. sodium sulphite in 250 ml. water and diluting with an equal volume of ethyl alcohol. The liquid in the flask is then carefully heated so as to distil off all but about 10 ml. This is then diluted with water to 100 ml. and 10 ml. of nitric acid and an excess of a standardised solution of silver nitrate are added. The solution is then warmed to drive off the nitrous gases and to coagulate the silver chloride, and then cooled and the excess silver nitrate titrated with a solution of ammonium thiocyanate (ferric alum indicator). 

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