Phenyl antimony pentachloride

Since N-nitrosoimmonium ions seem to be involved in the hydrolysis of a-acetates, it should be possible to isolate such species as stable salts. For this purpose, we selected a system such as XVII in which the phenyl group should provide further stabilization of such a carbonium ion. After the reaction of nitrosyl chloride with the corresponding imines, addition of antimony pentachloride resulted in the precipitation of pale yellow solids these could be isolated and stored under nitrogen for several days at room temperature. ... 

Depending on the substituents in (61) and on the concentration of the catalyst, however, other products may also subsequently be formed. In some cases, SbCl5-complexed primary intermediates of type (65) could even be isolated and characterized by NMR spectroscopy as well as by well-defined chemical reactions (81JA1789). Treatment of tetraphenyl-1,2,4-trioxolane (67) with antimony pentachloride or liquid sulfur dioxide, a mild Lewis acid, gave benzophenone and phenyl benzoate in a molar ratio of 1 1 (80JA288). The formation of the ester corresponds to that of the carboxylic acid from (61) via path A or path B. 

A spectrophotometric procedure has been described184 based on the formation of a coloured complex with antimony pentachloride in carbon tetrachloride, for the determination of 0.01-1.0% biphenyl in phenyltrichlorosilane. These workers also described a spectrophotometric method for the determination of 0.01-10% biphenyl in phenyltrichlorosilane based on measurement of the difference in extinction of solutions of the sample and a standard in chloroform-ethanol at 251 nm. The determination of biphenyl in phenyltrichlorosilane and its hydrolysis products have also been discussed185 The extinctions of pure phenyl trichlorosilane and the sample are measured at 251 nm in chloroform ethanol 1 1 the difference is related to the content of biphenyl, which absorbs 60 times more strongly than phenyltrichlorosilane at that wavelength 0.05-10% of biphenyl may be determined. 

PHENYL PHOSPHATE (115-86-6) Combustible solid but does not burn without a source of ignition (flash point 428°F/220°C). Incompatible with strong oxidizers, strong acids, nitrates, antimony pentachloride, magnesium, silver nitrate, zinc acetate. Attacks some plastics, rubber, and coatings. 

Starting with 2-bromo-l-chloro-2-phenylacetaldehyde (4-toluene)sulfonylhydra-zone (2.288) (l-chloro-2-phenylethenyl)(4-toluenesulfonyl)diazene (2.289) was obtained with triethylamine in ether. A solution of the diazene in methylene chloride becomes greenish after addition of antimony pentachloride at -30°C. Above — 20°C N2 is evolved. At — 70°C, however, a red solution is formed. The latter develops N2 even at — 60 °C. The red solution corresponds to the l-chloro-2-phenyl-ethenediazonium ion 2.290 (2-111). The structure of 2-phenylethynediazonium ion (2.291) can be attributed to the compound in the greenish solution on the basis of the IR spectrum (C = C at 2150 and 2255 cm — N N at 2295 cm ) and of the following reactions with nucleophiles. 

PPSA can also be obtained by the condensation of methyl-(4-anilino-phenyl) sulfide with antimony pentachloride." The reaction proceeds in chloroform at —68°C. The process is shown in Figure 5.7. After polymerization, a demethylation step follows as shown in Figure 5.6. 

Figure 5.7 Condensation of Methyl-(4-anilino-phenyl) Snlfide with Antimony Pentachloride...

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