Mercaptan: general formula

Of the general formula, R - S — H, where R represents an aliphatic or cyclic radical, the thiols —also known as mercaptans— are acidic in behavior owing to their S—H functional group they are corrosive and malodorous. Their concentration in crude oils is very low if not zero, but they are created from other sulfur compounds during refining operations and show up in the light cuts, as illustrated in Table 8.6. 

Mercaptans are organic sulfur compounds having the general formula of R-S-H. As stated earlier, amine treating is not effective for the... 

Amphipathic substances such as we have discussed throughout this chapter are used as collectors. Alkyl compounds with C8 to C18 chains are widely used with carboxylate, sulfate, or amine polar heads. For sulfide minerals, sulfur-containing compounds such as mercaptans, monothiocarbonates, and dithiophosphates are used as collectors. The most important collectors for sulfides are xanthates, the general formula for which is... 

The mercaptans have a general formula, RSH, in which the R represents any organic group. The mercaptans are known also as thiols. 

Base-catalyzed condensation of 2-(acetyl)thioindoxyl with aromatic aldehydes affords compounds with the general formula 330, which give the adducts 331 with aryl mercaptans in the presence of piperidine.582... 

Sulfoxide Radical. Denoted by the formula —SO—, Sulfoxides are organic compds of the general formula R.SO.R which are obtd by oxidation of mercaptans (analogous to ketones). They form both metal perchlorate complexes and nitrated organic derivatives. Examples of these compds of Ordn interest are presented below... 

Mercaptans organic compounds having the general formula R-SH. 

When reacted with mercaptans or thiophenols of the general formula RSH yields thioethers (Bielig and Reidies [23]) ... 

It is possible to prepare compounds of the general formula Sn(SR )R3 from reactions of a mercaptan (R SH) and either Sn(hal)R3 (hal = Cl, Br, I), Sn(OH)R3, or (R3Sn)20 (R,R = alkyl, aryl groups).The example given here uses x-oxo-bis(tributyltin) as the organotin precursor because this is one of the least expensive tin compounds available. 

Thioalcohols, general formula R—SH, are the sulfur analogs of alcohols. Sulfur is below oxygen in the Periodic Table. Both are divalent and there are similarities in their behavior. Thioalcohols are also referred to as mercaptans. The SH group is referred to as the thiol or mercaptan or sulfhydryl group. 

Numerous unusual organosulfiir transition metal compounds have been obtained by reactions of various metal carbonyls and cyclopentadienyl-metal carbonyls with certain mercaptans, sulfides, disulfides, and dithietenes (1,2). Other types of organosulfiir transition metal compounds have been obtained from metal sulfides and certain acetylene derivatives (3). This paper discusses a new and entirely different synthesis of new types of organosulfur derivatives of metal carbonyls with metal-sulfiir bonds. These new compounds have been obtained by thermal or photochemical decarbonylation of compounds of general formula CH S CH ) U(CO)yHC H )y (n = 1,2 or 3 M = Fe [x 2, y = 1], or Mn [x = 5, y = OJ) without metal-sulfur bonds. These sulfur-containing transition metal alkyl derivatives, none of which has been previously reported, may in turn be obtained from metal carbonyl anions and the chloroalkyl methyl sulfides CH S(CHpnCl. 

Thiols, also called mercaptans, have the general formula RSH, and thioethers, also called alkyl sulphides, have the general formula R1SR2. 

Thioalcohols, also called mercaptans, correspond to the general formula R—S—H. The... 

Thiols, also called aliphatic mercaptans, with the formula RSH, are the sulfur analogs of alcohols. Thiols generally show stronger molecular ion peaks than the equivalent alcohols. Looking back at Table 10.4, sulfur has a signihcant isotope. This gives rise to an enhanced M + 2 peak in the mass spectrum of sulfur-containing compounds. 

In the preparation of the AB surfactants, a monofunctional initiator (i.e., one having a single acidic hydrogen) such as a monohydric alcohol (ROH), an acid (RCOOH), a mercaptan (RSH), a secondary amine (RR NH), or an TV-substituted amide (RCONR H) is employed as the initiator. A controlled feed of the A oxide is added to obtain the desired average degree of polymerization, m, after which the feed of the B oxide is started. Such materials would generally be given by the formula... 

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