Chloro sulfanes

These bromosulfanes are prepared in a manner analc ous to SgBrg (method II), using the same apparatus. About 30 g. of chloro-sulfane is used. 

Sulfane Chloro-lrifluorotnelhyl-E10b,. 607 (Educt) E10b2. 73 (Fduct)... 

Both the H chemical shifts and NOE data suggest that chloro-A -sulfanes and sulfonium salts 24 and 25 having an o-MeO, o-Cl, or o-Me substituent on the aryl ring assume a skew conformation, whereas the aryl ring in compounds without an ortV o-substituent can rotate practically freely about the S-C(l ) axis. H and N NMR examinations of diaryl(acylamino)(chloro)-A -sulfanes 24a-e showed that they exist only in CDCI3 and dimethyl sulfoxide-t4 (DMSO- 6) solvents (Equation 3), whereas in MeOD complete ionic dissociation takes place, leading to the sulfonium chloride (see Table 5) <2001J(P2)339>. 

NMR can be used for the characterization of axial hypervalent S-Cl bond and S- O close contact in chloro-A -sulfanes and sulfonium salts 24-26 with or7,4o-substitution in the aromatic ring. The solvent effect has also been investigated CDCI3 is the most favorable for stabilizing the hypervalent S-Cl bond (see Table 5) <2001J(P2)339>. 

C2H2BrFjS, X -Sulfane, (2-bromoeth-enyl)pentaf1uoro-, 27 330 C,H,C102, Acetic acid, chloro-, ruthenium complex, 26 256... 

Chloro-4,6-bis(methylsulfanyl)-l,3,5-triazine (15) on reaction with disodium tetrasulfide forms a bidentate bistriazine molecule 16 which is linked by a sulfane chain.103 This type of compound exhibits excellent rubber-vulcanization properties. 

If, however, a very lai e excess of the HgSn component (a) is used, individual sulfanes can be obtained via direct sjmthesis. In this case, the rate of formation of the sulfane is so much lai er than that of the homeless that it is reaction-controlling. The excess of the sulfane, (a - 2)H3Sn, is distilled off after the reaction. Using this principle, it is possible to obtain, with appropriate chloro-... 

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