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Alkylmercuric bromides

Meanwhile, Reutov et al.4 had reported that reaction (1) followed first-order kinetics, first-order in alkylmercuric bromide and zero-order in mercuric bromide, when anhydrous dimethylsulphoxide (DMSO) was used as the solvent. This report was confirmed by Ingold and co-workers3 and hence is the first authentic record of a reaction following mechanism SE1. Over a six-fold variation in the initial concentration of a-carbethoxybenzylmercuric bromide and a three-fold variation in that of mercuric bromide, only the first-order rate coefficient with respect to the alkylmercuric bromide remained constant3. The rate coefficients reported by the two sets of workers are given in Table 1, together with the reported Arrhenius equations. [Pg.38]

Dialkyl ketones (4, 353). Alkylmercuric bromides react with nickel carbonyl in DMF to give only modest yields of symmetrical ketones. Yields can be markedly improved by in situ conversion to alkylmercuric iodides b addition of K1 to the reaction. [Pg.336]

In solvent DMSO, the rate of reaction (17) (R = Me, X = Cl) was too fast to follow, but using the mixture DMSO-dioxan (1 9 v/v) at 24.7 °C, rate coefficients for the substitution of the gold(I) complex by several alkylmercuric salts were obtained. It was found that in this mixed solvent, reaction (17) followed first-order kinetics, first-order in the gold(I) complex and zero-order in the alkylmercuric salt. Furthermore, the first-order rate coefficient had the same value no matter what alkylmercuric salt was used (methylmercuric acetate, methylmercuric chloride, methylmercuric bromide, and ethylmercuric chloride were the salts used). At 24.7 °C, the first-order rate coefficient has the value 0.0083 sec-1, with a standard deviation of 0.0006 sec-1. [Pg.46]

Alkylmercuric halides react analogously with ethynylmagnesium bromide, yielding alkyl(ethynyl) compounds of the type RHgC=CH.171... [Pg.774]


See other pages where Alkylmercuric bromides is mentioned: [Pg.38]    [Pg.39]    [Pg.42]    [Pg.62]    [Pg.73]    [Pg.38]    [Pg.39]    [Pg.42]    [Pg.62]    [Pg.73]    [Pg.285]    [Pg.39]   
See also in sourсe #XX -- [ Pg.336 ]

See also in sourсe #XX -- [ Pg.336 ]




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