About: Ortho Effect on Acid-catalyzed Hydration of 2-Substituted alpha-Methylstyrenes     Goto   Sponge   NotDistinct   Permalink

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  • alpha-Methylstyrene and its nine ortho-substituted analogs have been synthesized and the kinetics of their acid-catalyzed hydration in aqueous solutions of sulfuric acid at 25 °C, investigated. The kinetic acidity function HS has been constructed from the dependence of the observed rate constants kobs on the sulfuric acid concentration. The catalytic rate constants of the acid catalyzed hydration kortho have been calculated as well. The identical shape of the kinetic acidity functions for ortho- and para-derivatives confirms what the consistent mechanism A SE2 of the acid-catalyzed hydration has already proved for para-derivatives. The A SE2 mechanism involves a rate-determining proton transfer of the hydrated proton to the substrate.
  • alpha-Methylstyrene and its nine ortho-substituted analogs have been synthesized and the kinetics of their acid-catalyzed hydration in aqueous solutions of sulfuric acid at 25 °C, investigated. The kinetic acidity function HS has been constructed from the dependence of the observed rate constants kobs on the sulfuric acid concentration. The catalytic rate constants of the acid catalyzed hydration kortho have been calculated as well. The identical shape of the kinetic acidity functions for ortho- and para-derivatives confirms what the consistent mechanism A SE2 of the acid-catalyzed hydration has already proved for para-derivatives. The A SE2 mechanism involves a rate-determining proton transfer of the hydrated proton to the substrate. (en)
Title
  • Ortho Effect on Acid-catalyzed Hydration of 2-Substituted alpha-Methylstyrenes
  • Ortho Effect on Acid-catalyzed Hydration of 2-Substituted alpha-Methylstyrenes (en)
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  • Ortho Effect on Acid-catalyzed Hydration of 2-Substituted alpha-Methylstyrenes
  • Ortho Effect on Acid-catalyzed Hydration of 2-Substituted alpha-Methylstyrenes (en)
skos:notation
  • RIV/00216275:25310/09:00008251!RIV10-MSM-25310___
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  • Z(MSM0021627501)
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  • 1
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  • 332165
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  • RIV/00216275:25310/09:00008251
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  • styrene; acidity function; substituent effects; ortho effect (en)
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  • CZ - Česká republika
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  • [E7240CFA753F]
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  • Collection of Czechoslovak Chemical Cimmunications
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  • 74
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  • Bureš, Filip
  • Pytela, Oldřich
  • Prusek, Ondřej
http://linked.open...n/vavai/riv/zamer
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  • 0010-0765
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http://localhost/t...ganizacniJednotka
  • 25310
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