Sodium monosulphide

H. Riesenfeld found the solubility of ammonia in soln. of sodium sulphide to be a linear function of the Na2S-conc. and they measured the ammonia press, of A-soln. of ammonia in sodium sulphide. With soln. containing 0 5, 1, and 1 5 mol. of sodium monosulphide, the respective press, of the ammonia were 15 18, 16 94, and 18 55 mm., when the press, of the ammonia in 2V-aq. soln. was 13 45 mm. According to W. P. Bloxam, potassium sulphide is stable at a low red heat and does not decompose when it is melted. P. Berthier stated that it is volatilized at high temp. When it is roasted in the air, potassium sulphide... 

H. Bottger has said that when a soln. of the alleged sodium pentasulphide is boiled with head hydroxide, it behaves like a mixture of sulphur and sodium monosulphide, for lead sulphide and sodium thiosulphate are produced he adds that in... 

According to Chesneau,6 a polysulphide, Co2S7, is precipitated as a black mass when a solution of sulphur in aqueous sodium monosulphide is added to one of cobalt chloride. If this precipitate is dissolved in sodium polysulphide solution and the liquid evaporated in vacuo, black crystalline plates separate out. 

Sodium monosulphide, Na2S.—The monosulphide is formed by the interaction of sulphur and a great excess of sodium, the superfluous metal being removed by distillation8 by the action of hydrogen sulphide on sodium hydroxide and by the action of sulphur on excess of sodium dissolved in liquid ammonia, and evaporation of the solvent.9... 

A quantitative yield of sodium monosulphide is obtained by heating sodium hydrogen sulphide very gradually, the evolved hydrogen sulphide being continually removed 10... 

Sodium monosulphide is manufactured by reducing sodium sulphate with charcoal, and can also be obtained in solution from the alkali-waste of the soda manufacturer.11... 

In aqueous solution sodium monosulphide reacts with iodine to form. sodium iodide, the liberated sulphur dissolving in excess of the sulphide solution.10 A double sulphide of the formula Na2S,Cu2S has been prepared.11 It melts at 700° C. 

The trisulphide in the form of trihydrate was similarly prepared by Bottger as golden-yellow crystals. The anhydrous substance is produced by the interaction of sodium monosulphide and the calculated amount of sulphur in boiling toluene.5 Its melting-point is given by Friedrich 8 as 320° C. Its heat of formation in solution is 106-4 Cal.7... 

It is a white, crystalline solid, very deliquescent, freely soluble in water, and moderately soluble in alcohol. When exposed to air it evolves hydrogen sulphide,1 and is completely decomposed by heat into this gas and sodium monosulphide.2 The anhydrous salt is also obtained by the interaction at 300° C. of sodium monosulphide and hydrogen sulphide free from carbon dioxide and oxygen.3 Sabatier s4 method is to saturate a solution of sodium sulphide with hydrogen sulphide, and concentrate in an atmosphere of the same gas. A solution can be obtained by saturating sodium-hydroxide solution with hydrogen sulphide. A dihydrate and a trihydrate have been described.5... 

With sodium monosulphide cuprous sulphide forms a double salt of the formula Na2S,Cu2S.4 This compound melts at 700° C. 

Sodium Monosulphide. On passing air containing dichloroethyl sulphide through a concentrated solution of sodium monosulphide, a white turbidity is produced, due to the formation of diethylene disulphide of the following structure (see p. 236) ... 

Barton and his group have prepared the interesting new di-t-butyl thio-ketone (7) in high yield by reaction of carbon disulphide with the lithium salt of the corresponding ketone imine. Independently, Ohno and his co-workers have published an analogous synthesis of this non-enethiolizable thioketone (7). Aliphatic thiones and, possibly, enethiols have been obtained by reaction of arylimines with benzoic anhydride and a stream of hydrogen sulphide. Treatment of a vinyl chloride with sodium monosulphide led to the isolation of thio-dimedone (8 R = H), which has an enethiol ketone structure. Basic hydrolysis... 

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