A DFT Study of Radical Z/E Isomerization of BBr2C2H2Br

SEMRÁD, Hugo a Markéta MUNZAROVÁ. A DFT Study of Radical Z/E Isomerization of BBr2C2H2Br. In 16th Central European Symposium on Theoretical Chemistry. 2018.

Základní údaje

Originální název

A DFT Study of Radical Z/E Isomerization of BBr2C2H2Br

Název česky

DFT studie radikálové izomerizace BBr2C2H2Br

Autoři

SEMRÁD, Hugo ORCID a Markéta MUNZAROVÁ

Vydání

16th Central European Symposium on Theoretical Chemistry, 2018

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Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10403 Physical chemistry

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Označené pro přenos do RIV

Ne

Organizační jednotka

Přírodovědecká fakulta

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Anotace

V originále

Haloboration reactions of alkynes represent key elements in many organic synthetic routes, as evidenced in a series of 21 papers by A. Suzuki through 1983-1992.1 During an acetylene bromoboration reaction, (Z)–alkene is formed by the direct addition of boron tribromide to acetylene which undregoes a subsequent isomerization into (E)-dibromo(2-bromovinyl)borane cf. Wang and Uchyiama have proposed a polar isomerization mechanism catalyzed by another BBr3 molecule with a barrier of ca. 26 kcal/mol.2 This is in contrast with recent experimental findings obtained in our department.3 The present DFT study concentrates on an alternative mechanism initiated by a reaction of Z-alkene with the radical Br., whose presence is expected due to the interaction with residual air humidity.