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vol.62The effect of synthesis parameters on the catalytic synthesis of multiwalled carbon nanotubes using Fe-Co/CaCO3 catalystsA mechanistic study of hydroboration of 1-octene with 1,3,2-dithiaborolane and 1,3,2-dithiaborinane: Part 2. A DFT study of disproportionation and hydroboration índice de autoresíndice de assuntospesquisa de artigos
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South African Journal of Chemistry

versão On-line ISSN 1996-840X

Resumo

HADEBE, Siphamandla W.  e  ROBINSON, Ross S.. A mechanistic study of hydroboration of 1-octene with 1,3,2-dithiaborolane and 1,3,2-dithiaborinane: Part 1. Synthesis and kinetic studies. S.Afr.j.chem. (Online) [online]. 2009, vol.62, pp. 77-83. ISSN 1996-840X.

Alkylthioboranes 1,3,2-dithiaborolane and 1,3,2-dithiaborinane have been synthesized from the reaction of BH3-SMe2 with 1,2-ethanedithiol and 1,3-propanedithiol, respectively. These heterocyclic boranes disproportionated significantly during their synthesis. The rate constants, and the enthalpies and entropies of the hydroboration reaction of 1-octene with 1,3,2-dithiaborolane and 1,3,2-dithiaborinane have been investigated, and we have shown that hydroboration with these boranes is slow and proceeds via an associative mechanism.

Palavras-chave : Hydroboration; disproportionation; boranes; transition states.

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