Determination of the Free Activation Energies for the Interconversion of Isomers of 2,4-Pentadienyldipropylborane via Consecutive 1,3-Boron Shifts

Mikhail E. Gurskii, Ilya D. Gridnev, Alexei V. Geiderikh, Anatoly V. Ignatenko, Yuri N. Bubnov, Vadim I. Mstislavsky, Yuri A. Ustynyuk

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The fluxional behavior of the E (4a) and Z (4b) isomers of 2,4-pentadienyldipropylborane has been studied by dynamic 1H and 13C NMR spectroscopy. Activation barriers have been determined for degenerate metallotropic rearrangements of 4a and 4b and for 4a ⇄ 4b interconversion by complete line shape analysis of 13C DNMR spectra. The data obtained suggest that only 1,3 shifts of BPr2 groups take place in both isomers rather than 1,5 sigmatropic shifts.

Original languageEnglish
Pages (from-to)4056-4061
Number of pages6
JournalOrganometallics
Volume11
Issue number12
DOIs
Publication statusPublished - 1992 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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