Synthesis and dynamic behaviour of diethyl(1-indenyl)borane

Ilya D. Gridnev, Anton Meller

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Sigmatropic [1,3] B shift was observed by 2D 1H EXSY NMR experiments in diethyl(1-indenyl)borane 1i prepared in 83% yield from indenyl lithium and chlorodiethylborane. The activation barrier of the rearrangement (EA = 17.7±0.2 kcal mol-1, lnA = 28.6±0.5) was determined from a series of 2D 1H EXSY spectra recorded in the temperature interval 25-80°C. After prolonged storage at ambient temperatures or short heating at 100°C an equilibrium between 1i, diethyl(3-indenyl)borane 4i, and diethyl(2-indenyl)borane 5i is established (the equilibrium ratio 1i:4i:5i is 1:2.3:0.2). Addition of an excess of pentadeuteropyridiine leads to a new equilibrium between corresponding complexes (the ratio 1j:4j:5j is 1:3.2:0.2).

Original languageEnglish
Pages (from-to)271-277
Number of pages7
JournalMain Group Metal Chemistry
Volume21
Issue number5
DOIs
Publication statusPublished - 1998 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry

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