Mercaptides, organic

Pt(CO)2Cl2] is used to deposit thin films of metallic platinum on surfaces. Concentiated organic solutions of poorly defined platinum complexes of alkyl mercaptides or sulforesinates are used to coat ceramics and glass. 

An important aspect of this is the splitting of the polymer chain with thiol (eq. 5) or mercaptide ion (thiol + base catalyst). In fact, sodium sulfide or organic monothiols, eg, mercaptoethanol or decyhnercaptan, are utilized to lower the molecular weight of polysulftdes or to limit the extent of curing reactions. 

Spent caustics may therefore contain sulfides, mercaptides, sulfates, sulfonates, phenolates, naphthenates, and other similar organic and inorganic compounds [38]. Spent caustics can also be classified as phenolic and sulfidic [37]. Sulfidic spent caustics are rich in sulfides, contain no phenols, and can be oxidized with air. Phenolic spent caustics are rich in phenols and must be neutralized with acid to release and remove the phenols. 

The disulfide link is also opened by metallic mercury thus, di(3-phenyl-l,2,4-thiadiazol-5-yl) disulfide (327) yields the corresponding mercaptide (328) which is changed back to the disulfide by treatment with iodine in organic solvents.151... 

The unique feature of the alkyllithium compounds that makes them useful as diene initiators is their character as exceedingly powerful bases yet they are soluble in organic solvents and quite thermally stable. Alkyllithium compounds are sufficiently basic to add to hydrocarbon monomers. However, lithium salts of stabilized anions, such as acetylide and fluorenyl anions, are too weakly basic to add to such double bonds. Similarly, alkoxides and mercaptides fail to react with hydrocarbon monomers, but lithium alkyl amides react analogously to alkyllithium compounds. 

The selected organic salts of Ba, Cd, Zn, Sn, Pb, and Ca perform with varying degrees of acceptability. Barium-cadmium and barium-cadmium-zinc are the most widely used tin mercaptides and organotin complexes are utilized where ultimate clarity is required lead salts dominate in electrical applications, and calcium-zinc combinations have been traditionally used when FDA approval is necessary. Organic phosphites are also utilized as so-called chelators, complexing the half-chloride salt... 

In addition to mercuric sulfide itself and salts containing the HgS -ion (formed by treatment of HgS with a solution containing excess sulfide ion), four types of organic sulfur-mercury compounds might be noted (1) mercaptides of the type (RS-—)2Hg (2) halomercuri-mercapiides ( half halide, half mereaptide ) of tyue X—Hg—SR (3) sulfide adducts of the... 

The performance of organotin mercaptides is not only based on the amount of tin metal content, but on the organotin species, mercaptide ligand chemistry and organic co-stabiliser (453). The mechanism of organothiotin stabilisation has been studied extensively (221,347, 348, 387, 388). 

Sodium amalgam has been used to cleave sulfur-sulfur bonds. Solutions or suspensions of organic di- or polysulfides can be reduced with Na(Hg) in the presence of an alkali sulfide to the mercaptide [125]. 

Scheme 3.3.3 Proposed mechanism of exchange of chloride atoms in PVC by mercaptide groups of organ-otin stabilizers coordination ofallylic chlorine by organotin mercaptide with subsequent rearrangement to a non-allylic structure...

The metal mercaptide can be prepared by the reaction of alkylmercaptan with sodium metal in an organic solvent (e. g. xylene). Carbamoyl chloride is prepared by the reaction of the amine with phosgene in the presence of an acid binder (e.g. /-amine) according to the following scheme ... 

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