Ortho-Efekt při kysele katalyzované hydrataci 2-substituovaných alfa methylstyrenů

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F09%3A00008251" target="_blank" >RIV/00216275:25310/09:00008251 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Ortho Effect on Acid-catalyzed Hydration of 2-Substituted alpha-Methylstyrenes

Popis výsledku v původním jazyce

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. From the dependence of the catalytic rate constants of ortho-derivatives on the catalytic rate constants of para-derivatives, it has been seen that the logarithm of the catalytic rate constant for hydrogen as a substituent is markedly out of the area incl

Název v anglickém jazyce

Ortho Effect on Acid-catalyzed Hydration of 2-Substituted alpha-Methylstyrenes

Popis výsledku anglicky

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. From the dependence of the catalytic rate constants of ortho-derivatives on the catalytic rate constants of para-derivatives, it has been seen that the logarithm of the catalytic rate constant for hydrogen as a substituent is markedly out of the area incl

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CC - Organická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Collection of Czechoslovak Chemical Communications

ISSN

0010-0765

e-ISSN

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Svazek periodika

74

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

15

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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