Sodium mercaptides

Preparation of 2 4-dinitrophenyl-sulphides. Dissolve about 0-5 g. (or 0 005 mol) of the mercaptan in 10-15 ml, of rectified spirit (or in the minimum volume necessary for solution warming is permissible) and add 2 ml. of 10 per cent, sodium hydroxide solution. Mix the resulting sodium mercaptide solution with a solution of 1 g. of 2 4-dinitrochlorobenzene in 5 ml. of rectified spirit. Reaction may occur immediately with precipitation of the thioether. In any case reflux the mixture for 10 minutes on a water bath in order to ensure the completeness of the reaction. Filter the hot solution rapidly allow the solution to cool when the sulphide will crystaUise out. RecrystaUise from alcohol. 

Strong alkaline solutions are used to extract cresylic acid. The aqueous layer contains, in addition to sodium phenate and cresylate, a small amount of sodium naphthenates and sodium mercaptides. The reaction between cresols and sodium hydroxide gives sodium cresylate. 

From the bottom of the extractor, the caustic solution, containing sodium mercaptide, enters the regenerator. Plant air supplies oxygen to react with the sodium mercaptide to form disulfide oil (Equation 1-11), which is insoluble in caustic. The oxidizer overhead stream... 

SYNS SODIUM BISULFIDE SODIUM HYDROGEN SULFIDE SODIUM HYDROSULFIDE, solution (NA 2922) pOT) SODIUM HYDROSULFIDE, with <25% water of crj stallization pN 2318) pOT) SODIUM HYDROSULFIDE, with not <25% water of crt stallization pN 2949) pOT) SODIUM MERCAPTAN SODIUM MERCAPTIDE SODIUM SULFHYDRATE... 

This reaction is analogous to similar methods for the preparation of ethers (methods 113 and 116), Both simple and mixed sulfides may be made from aliphatic mercaptans or thiophenols. The sodium mercaptides are formed from the mercaptans and aqueous or alcoholic solutions of sodium hydroxide or alcoholic sodium ethoxide. Alkylation is effected by halides, alkyl sulfates, or esters of sulfonic acids. The over-all yields of sulfides are usually above 70%. r-Butyl mercaptan is alkylated directly by /-butyl alcohol in strong sulfuric acid to give /-butyl sulfide in 87% yield. ... 

A commonly used method to prepare sulfides is to react a chloride and sodium mercaptide. Mercaptans and alcohols will react in the presence of acidic catalysts, at elevated temperatures (300-400°C), to produce sulfides ... 

One method of preparation is from the respective 2-chloro-4,6-bis(alkylamino)-j-triazine and sodium mercaptide according to the following reaction scheme (Dubley, et al., 1951 Hamm and Speciaie, 1966 Speciaie, et al., 1967) ... 

Sodium mercaptan Sodium mercaptide. See Sodium bisuifide... 

Peroxyacetic acid s. H2O2/CHSCOOH Sodium mercaptides Sulfinic acids from sulfones... 

Mercaptan dissociation is low and corresponds to a dissociation constant of around 10"1. In FCC condensates, the major sulfur component is NH4HS along with small concentrations of HzS, In spent caustic, the main components are sodium mercaptides, RSNa, along with the NazS sulfide. 

Sodium mercaptides Sulfinic acids from sulfones... 

Acid or bisulfite is gmerally added to neutralize the sodium mercaptide terminals formed [17] ... 

The conversion of mercaptans to sulfides is effected by converting to the sodium mercaptide and reacting with active halides or dialkyl sulfates. 

Sodium mercaptides are prepared from the mercaptans and aqueous or alcoholic solutions of sodium hydroxide or alcoholic sodium eth-oxide. The sodium mercaptide reacts with halides, chlorohydrins, esters of sulfonic acid, or alkyl sulfonates [6] to give sulfides in yields of 70% or more. A recent report describes a general procedure for synthesizing aryl thioesters by a nucleophilic displacement of aryl halide with thiolate ion in amide solvents. No copper catalysis is necessary as in an Ullmann-type reaction. 

IIA) mercaptan RSH and dimercaptan Y(SH)2 and alkali in water or preformed sodium mercaptide RSNa in alcohol ... 

II Acylation of organotin sodium mercaptide RnSnCSNa) with benzoyl chloride. 

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