Potassium hydrogen sulfide

Reactions with Sulfur Compounds. Thiosuccinic anhydride [3194-60-3] is obtained by reaction of diethyl or diphenyl succinate [621-14-7] with potassium hydrogen sulfide followed by acidification (eq. 10). Thiosuccinic anhydride is also obtained from succinic anhydride and hydrogen sulfide under pressure (121). 

Although the polysulfur macrocycles became more interesting to the scientific community after Pedersen s report of the crown compounds (see Chap. 1), examples of such structures may be found in the literature dating back some time. The first report of a macrocyclic polysulfide appears to be that by Ray who found in 1920 that when 1,2-dimercaptoethane and 1,2-dibromoethane were heated with alcoholic potassium hydrogen sulfide as shown in Eq. (6.2), triethylene trisulfide (2) and a substance presumed to be triethylene tetrasulfide (3) could be isolated. 

Nickel sulfide melts at 797°C and is insoluble in water (3.6 mg/L at 18°C soluble in concentrated nitric acid and potassium hydrogen sulfide solution slightly soluble in alcohol. 

Synonyms potassium hydrosulfide potassium hydrogen sulfide potassium... 

Analogous substitution reactions take place with alkane- and arene-thiolate anions <73JCS(P1)16S9), and pyridine-2- and -4-thiones are usually prepared by use of sodium or potassium hydrogen sulfide or thiourea (74JCS(P1)2300). 

Di-S-ethers of 3,5-dimercapto-l,2,4-thiadiazole are generally very stable and can be steam-distilled. The weakly basic diethyl ether is dealkylated by alcoholic potassium hydrogen sulfide, but resists attack by alcoholic ammonia at 200°. Hydrogen chloride under pressure causes complete degradation.144... 

Methanolic hydrogen sulfide reacts smoothly at 60° with ethylene sulfide to produce 1,2-ethanedjtbioJ. 7 Potassium hydrogen sulfide has 20-... 

Sulfides. Potassium sulfide, [CAS 1312-73-8], tUS. yellowish to reddish solid, soluble, formed by heating potassium sulfate and carbon to a high temperature potassium hydrogen sulfide, potassium bisulfide, potassium acid sulfide KHS, formed in solution by reaction of potassium hydroxide or carbonate solution and excess H2S. 

Salts of the ester 0,0 -diethyl dithiophosphate have been prepared by two different methods. One involves the reaction of (C2H50)2P(S)C1 with potassium hydrogen sulfide.1 The other is the reaction of phosphorus (V) sulfide with ethanol followed by the addition of metal halide.1-3 The second method is the basis for this preparation, although the chromium(III) compound has not previously been reported. Salts of cobalt(III), nickel(II), and lead(II) can be prepared by analogous reactions using cobalt (III) fluoride, nickel(II) chloride 6-hydrate, and lead(I) oxide, respectively. 

In 1953, Traverso and Sanesi,3 reacting 4-thiopyrones with potassium hydrogen sulfide, obtained two compounds for which they proposed formulas 2a and 2b. The reason for this choice was that these products, treated by phosphorus pentasulfide, gave compounds similar to those already described by Arndt and his co-workers.1,2... 

Pyran-4-thiones reacting with potassium hydrogen sulfide lead to a-(l,2-dithiol-3-ylidene) ketones and/or thiopyran-4-thiones (Eq. 

Propyne-l-thiol (Propargyl Mercaptan) and 2-Butyne-l-thiol from Potassium Hydrogen Sulfide and the Propargyiic Bromides... 

Mercaptopyrazine (151a) is best prepared by the action of sodium hydrogen sulfide on chloropyrazine in dimethylformamide.147 It decomposes on heating with evolution of hydrogen sulfide and formation of di-2-pyrazinyl sulfide. The latter compound is also obtained together with mercaptopyrazine on treatment of chloropyrazine with aqueous potassium hydrogen sulfide solution. Comparison of the... 

Compound 100 (R = H) may be prepared by treating the thiocyanate (101a) with sulfuric acid,103 109 110 by treating o-chloro-methylbenzonitrile with alcoholic potassium hydrogen sulfide (see later),103,110 by cleavage of o-benzylthiomethylbenzonitrile (101b)... 

More commonly, but incorrectly, named thiophthalic anhydride and sometimes referred to as phthaloyl monosulfide or o-phthalyl sulfide, this compound (104) may be prepared by heating phthalic anhydride with sodium sulfide125 or by heating phthaloyl chloride with potassium hydrogen sulfide,126 hydrogen sulfide,127 or ethanolic sodium disulfide.128 The reaction between phthaloyl chloride and hydrogen sulfide also gives phthalic anhydride and di-o-phthaloyl disulfide.127 Early attempts to prepare 104 have been described by Chakravarti.126 4-Nitrophthalic thioanhydride may be prepared by hydrolysis of 8 (R = N02 X = C1) (Section III, A).22... 

Bromothiazole (1) reacts with thiourea in alcohol to yield a mixture of dithiazolyl monosulfide (2) and A-4-thiazoline-2-thione (3) (Scheme 1) (4-6). Treatment of 2-bromo-4-methvlthiazole with potassium hydrogen sulfide in alcohol is reported to result in the formation of bis(4-methyl-2-thiazolylisulfide (7). which probably results from the reaction between the initially formed 2-mercaptothiazole and the initial 2-bromo-4-methylthiazole. 

The sulfonation reaction is reversible and benzenesulfonic acid may be desulfonated by treatment with dilute acid at 150 °C. The group can be displaced by fusion of its salt with sodamide to give the corresponding amine, with sodium hydroxide to give the phenol, sodium cyanide to give the nitrile, and potassium hydrogen sulfide to give the benzenethiol (Scheme 5.10). 

Thiobenzoylthioglycolic acid has been prepared by the interaction of potassium dithlobenzoate and alkali chloroacetate. " The required intermediate, dithiobenzoic acid, has been obtained from phenylmagnesium bromide and carbon disulfide, -or by the condensation of benzaldehyde and hydrogen polysulfides, or most conveniently by treatment of benzotrichloride with potassium hydrogen sulfide. - The last procedure has been adapted here to afford improved yields. 

KH2O0.5S potassium hydrogen sulfide hemihydrate 25.00 1.7000 1 2277 LiOH lithium hydroxide 1310-65-2 25.00 1.4500 ... 

Halogenopyrazines may react with sodium (or potassium) hydrogen sulfide or polysulfide to give the mercaptopyrazine and in some cases the corresponding sulfide. 

The preparation of mercaptopyrazines (1) by the reaction of halogenopyrazines with sodium (or potassium) hydrogen sulfide or sodium polysulfide in various solvents (780, 790, 799, 805, 809, 821, 858, 890, 892, 993, 1006-1011), by reaction with phosphorus pentasulfide in pyridine (1013), and by reaction with thiourea in acid (905) and in alcohol followed by alkali (535) has been described in Section V.5G. 

Derivation Heating chloracetic acid with potassium hydrogen sulfide. 

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