The solvolysis rates of 1-aryl-1-(p-methoxyphenyl)-2,2,2-trifluoroethyl and 1-aryl-1-(p-phenoxyphenyl)-2,2,2-trifluoroethyl bromides and chlorides were conductimetrically measured at 25.0 Β°C in 80% aqueous ethanol. The solvolysis rates of 1-(p-methylphenyl)-fixed series were also set up to analyze t
Gas phase substituent effects. Stabilities of 1-aryl-2,2,2-trifluoroethyl cations
β Scribed by Masaaki Hishima; Hiroki Inoue; Mizue Fujio; Yuho Tsuno
- Book ID
- 104226645
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- French
- Weight
- 290 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
Gss-phase stabilities of 1-aryl-2,2,2-trifluoroethyl cations were determined based on chloride-transfer equilibria. The substituent effect was analyzed based on the LArSR Eq., giving a remarkably high r of 1.53 and a p of -14.6. The previous study' has shown that the substituent effect for the gas-phase stabilities of 1-aryl-1-(trifluoromethyl)ethyl cations can be described excellently in terms of our LArSR equation (1)2 with an r of 1.40 and a p of -14.0. aAGo = p(a" + r AZ:) (I)
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The kinetics of the gas-phase reaction of 2,2,2-trifluoroethyl iodide with hydrogen iodide has been studied over the temperature range of 525'K to 602Β°K and a tenfold variation in the ratio of CF3CHtI/HI. The experimental results are in good agreement with the expected free radical-mechanism: An an